Can anyone help with how to animate with objects for wicked whims?

[DejaD12345]

Hey guys! So I've been creating animations for a while now. I know how to animate with doors, cars, etc. However, can anyone help me with animating with objects? For example, how do you animate with an object attached to a bone? For example, I want to attach a cell phone to the b__R_Stigmata, but I know the object's rig must be at the 0,0,0. I can manually animate the object  but it just looks really  choppy. And if i try to attach it the old fashioned way (like you would an accessory) it won't show up in Wicked Whims.