I didn't make it!
Will playing with mods online get me banned?
Like if Im using a mod to make guns and tanks look cooler, will punkbusters ban me because they think im cheating?
Total conversions (e.g., OPK, POE2) have their own servers, and thusly can only be joined if the mod is activated.
If you try and join a BF2 server when you have modified game files in the BF2 mod (eg, you changed the M1A2 to a pink camo scheme) you will be unable to join a server due to data differs from server.
Basically, if you want to have better skins when playing vanilla bf2 online, you can't :p. Play a TC instead, they have better skins off the bat.