Anti_Virus Policy Help

I have just taken over the Anti-Virus administrative duties. Employees have the opportunity to to download and use on their home PC's the company Anti-Virus Software. I post it to an FTP site and make it available to be mailed home. I have now been tasked to write proceedures for the home user to follow to download and update. What we currently have is very general and not well organized. The Antivirus software is McAfee we have UNIX/NT/WIN95 & 98/2000 updates. I need to find out if the multi-system Sdat for 95/98/NT & 2000 will work on ME as best I can tell it is not supported. I can find nothing on LINUX support. The McAfee site was more advertisement then help. I have been told to follow the KISS concept but be exact, oh yes and ASAP. Any suggestions would be most welcome.