[ConnorMcLeod]

m_iClientFrags is a copy of pev->frags

At UpdateClientDatas, if m_iClientFrags is different from pev->frags, m_iClientFrags is set to pev->frags value and ScoreInfo message is sent, i think it is how it is working for that game

But in that case your previous tests should have been working, so i don't really understand.

Anyway, change pdata won't have any effect, the only thing you should do is change pev->frags using set_user_frags or pev_frags or whatever.