The 3.5 MultiHack is a whole different cheat from the SCP. The SCP will let you do stuff like spawn TK squads, drop arty, teleport, build skyscrapers & much more.
The list of what you can do is huge, almost as big as a BIS changelog.
Just know that I'm not the only guy working on this.
We have MullahOmar
AnotherCheater (one of the authors of the original OFP SCP)
Also a load of ideas left behind by ex-developer Doc2.