My fault. I meant to use the fixed textures of the "Steelport Gangs DLC fixes" mod and retextured a bit myself (removing the fishnets etc.).
Eventually I was a bit careless and used the textures of the glitchy vanilla version when I repacked the *.str2_pc files. I 've uploaded the files again with the fixed textures this time.
I 'm afraid this need some mesh editing to get it done. I think I 've seen a topic here about importing 3D meshes into 3DS Max, but as far as I know there 's no way (yet) to export those back (without any issues) into the game.
I 've tried another way by altering the alpha channel of the texture 's diffuse map, but unfortunatly without any result. It is possible to recolor that top though.
The spec. settings can only be changed with the hex editor (for now). Sometimes I do some retexturing too when the texture of the normal map is too rough, then I smooth it out a bit to get better results.
It 's like IdolNinja said. Someone mentioned before that his friend, who he was playing coop with, couldn 't see him in ingame. "Won 't work" may be exaggerated, but it will cause glitches.
I 've never played the game in coop before though, so I cannot provide you with a solution for this issue.
About the "customize_item.asm_pc" file, if you use this mod with other mods that also make use of this file, then there 's a chance the game might crash at certain points.
Thank you for the answers, to bad about the top, i hope it can be changed eventually.
Thank you for the quick fix
Is it possible to add a few lines in the customization item to change the top color?