It's something I still can't figure out and that is getting converted clothing to work for Skyrim's CBBE body.

The clothing is made by modders and it's a personal mod, just in case it's asked.

Two problems arise when I try to do the conversions:

-I can't get it to show up in the CK, even though I used NIFSkope.

-The different poses between games make converting T-shirts to Skyrim much harder. Tried rotating the sleeves but it messes up the entire shirt.

I've tried all sorts of guides but I still am nowhere near figuring out the conversion stuff. Any help would be appreciated