Well I dont exactly know what you meen by a camo-pack (different greens and browns maybe?), but it is possible to change the colours. Just go the multiplayer.ini and add/remove/change a set of these lines:
Code:
MultiplayerColor ColorGold
RGBColor = R:221 G:226 B:13
RGBNightColor = R:221 G:226 B:13
TooltipName = Color:Gold
End
Then change the colour by adjusting the RGB values (0-255). Then, if you want to rename it, change the tooltip name to a string from your generals.csf/generals.str file