So you are in game and found an amazing place to put you mod. But now the problem, "What are my cell coordinates?"

It's actually easy to find. Type the following:

player.getpos x

player.getpos y

Then divide each value by 4096 to get the cell coords.

In the CK, select "Tamriel" from the location dropdown, then enter your new x and y coordinates. It will take you fairly close to where you were in game.