[SM9]

You would need to fake the m_iTeamNum netprop before GivePlayerItem then change it back after for example giving a p2k to a CT with usp in loadout means you would set teamnum to Terrorist then switch back after to make the csgo inventory ignore his loadout. I am writing a CSGOItems plugin similar to TF2Items although not sure if I would be allowed to release it.

Excuse lack of help as I'm writing this from my phone, ill post an example when I wake up.