Necessary :

Nifskope ; 
BSA Browser  BSA Browser  Necessary for the various routes 

any mod you like suitable for the change

Process : 

Skyrim data, extrat apart the BSA Skyrim meshes  . This is to know which one you change and where you are.

Identify the various routes, choose the dress to change . For this example, I changed the one for wench

If not present, create in Skyrim \data \meshes the correct path 

In the exsample, Skyrim data \meshes \clothes \wench

Download and extrat a mod . For example  [Melodic] Waitress Better with Bodyslide

copy in Skyrim data, calienteTools folder , the textures folder and, if present, the cubemap folder

Open bodyslide , reshape by paying attention to the path indicated . Take the nifs from the path , and copy them into the clothes\wench folder . Now, you can remove both the Bodyslides and the meshes created . DO NOT throw away textures

Open the clothes\wench folder and rename the nifs as

1stpersonwenchoutfitf_0

1stpersonwenchoutfitf_1

wenchoutfitf_0

wenchoutfitf_1

wenchoutfitbootsf_0

wenchoutfitbootsf_1

All wenches will wear the dress thus replaced

Other example : 
Create in Skyrim data \meshes , the clothes\prisoner folder . proceed as above, rename the nifs as 

1stpersonprisonerclothes_f_0

1stpersonprisonerclothes_f_1

prisonerclothes_f_0

prisonerclothes_f_1

prisonershoes_f_0

prisonershoes_f_1

You may ask: why nifskope if it has not been used so far?
Simple. If you want to apply SMP or HDT or Nioverride :

How to insert HDT-SMP (SkinnedMeshesPhysics)

How to insert HDT-PE into body

How to add NiOverride into armor

You will say ; " But there is TAWOBA to replace the clothes" . 

Sure, but you have to install about 1GB of mod to replace them 

With this method, you only change what you want, minimising the weight

Nifskope and, of course, SMP and all requirements , As far as I know, the best are COCOBody and BHUNP Baka Factory

Obtained the necessary, open NifSkope, import the femalebody (If possible from CalienteTools)

Extend 0NiNode (From here you will need to use Block List and Block Details, for page changes) . Righ Click On 0NiNode , select Block/Insert 

From the list, look for NiStringExtraData

Compilation of the String

Name : HDT Skinned Mesh Physics Object

StringData ; SKSE\Plugins\hdtSkinnedMeshConfigs\BaseShapeB.xml   ⚠️This path may vary depending on where the HDTSkinnedMeshConfig File is installed  

Go to Block List, read the number of the string you just entered

Click on 0NiNode , double click On the empty part of the string (where there is 0), enter the number (the string to be added is a)

Double click on the green ExtraDataList icon to open the drop-down menu Click on the arrow on the left to open the menu

Double click on the green ExtraDataList icon to compile, and enter the number 1 (Remember the string number seen earlier ??) If the string created had the number (ES: 101), the number 101 must be entered

SMP is thus applied  . The choice of the initial nif is only to find it ready when you go to remodel in Bodyslide

I think I haven't forgotten some steps

For this, we will need Nifskope

Start the program,File/Open/ import the shoes / boots . In order for it to work correctly, it must be applied on the heel

Select the heel / sole to view the NiTriShape that interests us . Con il NiTriShape selezionato, click destro / Block/Insert/NiStringExtraData

The buttons indicated will be used to jump from one section to another

Once the string has been added, it must be filled in

Click on Name and write in Uppercase: SDTA

This wording, including all brackets, will be pasted into the String Data

[{"name":"NPC", "pos":[0, 0, 5.0]}]

Let's go to Block List and read the number of the created string

Click on the NiTriShape of the shoes / boots to bind the string .

Double click on Num Extra Data List to mark how many strings will be added. in our case it will be 1

Double click on the green icon to extend the Extra Data list menu

Enter the string number. In our case 2

NiOverride is thus applied to shoes / boots . Click on File / Save and the nif will be overwritten automatically

For remove High Heel , read this  How to remove High Heels

Origin and Credit for this :  NIOveride boots heels footwear fix tutorial

Necessary for this work  NifSkope

Launch Nifskope /File/Open and import your nif 

Click on the nif (it turns green) to automatically highlight the relative Shape, passing to the Block List panel . From here on out, we should jump to the Blick List and Block Details panels

Extend the highlighted Shape menu until you find BSShaderTextureSet . Click on the latter to jump to the Block Details panel

Left / right click on the texture to be replaced and select Texture / Choose to access the various folders containing the Textures (DDS) . If the texture is already present (as in our case in the example), it will be necessary to search in the various folders, the texture to apply / replace . Remember that the program will always start from a texture already applied. if it were a nif without textures, or placed in a different folder, in Nifskope it will appear in purple

Once the texture has been identified, all that remains is to apply it

When done, click on File / save to automatically overwrite

Repeat the steps for all textures. in the order you will find them:
DDS_1
DDS_MSN
DDS_SK
CUBEMAP (Occasional)
DDS_S and / or DDS_M

Repeat the steps for nif_0 as well

Necessary for this operation

BakaFactory UUNP TBBP HDT Vagina All-in-one 1.3

Nifskope

Extract the Baka Factory zip, open the 00HDT PE Physics folder and copy the SKSE folder  into Skyrim data folder (overwrite where required) . 

1) Start Nifskope / Fiel / Open and import the femalebody_0

2) Helping us with Block List and Block Details, extend NiNode menu

3) Right click on NiNode and insert the Block NiStringsExtraData

4) Double click on NumStrings and change the value to 5 . Double click on the green Data icon to extend the menu

5) Name the string

6) Double click on Data to open the compilation page 

7) Repeat this step on all 5 lines, as shown in the figure

8  ) Block List to read the string number, then click on NiNode

9) In Num Extra Data List enter how many strings will be applied (in our case it will be 1) . In Extra Data List mark the number of the string (in our case it will be 1)

At this point, HDT is applied. Click on File and save

For Femalebody_1

Open Nifskope again (it will be opened 2 times) and as with the first, import the femalebody_1

From femalebody_0  with Block List and Block Details, right click on the newly created NiStringsExtraData, select Block / Copy

Switch to Femalebody_1, and always with the help of Block List and Block Details, select NiNode, right click Block / paste

At this point, the HDT is also applied to Femalebody_1. File / Save . Launch FNIS, and play 

Good fun