it's my first version with black socks. i not realy a fan of black socks with white short and white shirt. i think that combination is unbalanced, therefor i use some black on the shirt (it's not usual for sevilla).
i draw in paint and after i use a template for shadows and 3D efects in Photo Shop. i gues ther are some tutorials for kits for fifa series. maybe those will help you. i learn working and experimenting. on ewery new kit i use something new.
Im not too sure on the black on the home kit, but the design looks very good! Also, maybe you could make the design change a bit on the back part, cos both the kit and the shorts are esentially the same...