I think, you are looking on the item model template files. Based on these, they are constructing the items models based on that respective character....
Not sure if you are into Mu Online Development, but any viruses inside the main.exe are not viruses, but false positive Trojan signature or whatever...
I've read the posts here and true. A lot of private servers are ran by incompetent administrators. But, in this case, you(we as players) are the one...