Yoy can make variation by yourself it'not too difficult. Here's the example:

[texture]
sim=cs757-200 (or cs757-200RR)
model=PWWV (or the model you use)
texture=(your texture)
atc_id=(your atc ID)
atc_airline=(it's easy:))
atc_flight_number= (no problem)
ui_manufacturer=Captain Sim
ui_type=Boeing 757-200 PW (or RR)
ui_variation=USA_2006_winglet (for e.g.)
description= (whatever)

Something like this. It's a simple .txt file.

P.S.
If it's still too hard to figure it out, then just send [fltsim] with your livery and I'l make a description for you.