when i tried to install tribes 2 from this site my virus program noticed a trojan'
might wanna fix that:P
Random side note, if you find yourself getting a lot of false positives (viruses on legitimate files), you may want to reconsider your choice of anti-virus.
Personally, i use Eset's NOD32, which is one of the leaders in the field. They've got a tiny footprint (amount of resources taken), its damn near invisible unless a malicious file is detected, and the scans are extremely fast in comparison to many AV products out there.
Plus, it's not horrific like Symantec's offerings.