Your mod looks fine, but if you would not mind doing a total re-draw, that'd probably be even more cool. Personally, i don't think people like my artwork. It may be too adult-themed/ too hentai-ish for most, especially since this is an action game and not a hentai game. As for the alternate outfit, i've already got the 3d-model.
The goal was for me to do every in-game pic of Roll twice, one with normal jumpsuit and another with the alternate outfit.
I stopped just because the boobs were just too gawd-damn BIG
Not to mention the suggestiveness of the chest region. Personally, i think i just went too far into making her straight Hentai material.
note: please be an adult/mature if you view the link below...http://i1191.photobucket.com/albums/z476/vkp_JJ/set_001bb.png
After seeing/looking at it the day after i drew it, i just knew i had to stop. (Yeah, that's suppose to be armor O_O)
As for SAI, yeah, that's what i use too. Normally after i draw something that's ready to put in the game, I just clean the border/outline of whatever it is i drew so you get a clean cookie-cutout with no artifacts.