I'm sorry, but I have been using this site for quite some time (haven't registered, but I do have downloaded mods from here), and even while from time to time I got "Trojan.Win32.Swisyn.adwt" warnings from my antivirus software, I simply disabled it and installed my mod, then performed full system scans, and didn't found anything at all nor I'm experiencing any of the typical symptoms of that malware.
Providing information that is personal to this site you are risking the possibility of being spammed, infected by malware, or infected by viral programs that can cause negative things to happen to your system.
Nfscars.net is my haven for mods. I have joined the forum and I love all the mods they provide here. Modloader is not a virus. I never had a virus. Been using for 4 years. It keeps getting better and better.