I use Go!zilla download manager, and Mijenix Fix-it utilities for virus checking - it's worked fine, but ....
Go!zilla has a properties box where you can type the .exe of your virus checker to check as you download.

After digging through the manual, I asked Mijenix support which executable was the virus checker - they eventually gave me an .exe that isn't even in the suite!

Does anyone else use the two programs? How can I tell if I'm really virus-checking my downloads? They both keep referring me to each other!