I know for qchain and used it.
I have had problems with SP2 and Microsfot Proxy (128bit encryption in SP2) so I used qchain to apply abouth 40-50 pacthes (both SP2 and SP3) in once to avoid 40 restars of server.
It work great, but my users are not so computer literate so I am looking a way to patch IE (dont want to use WinInstall LE) using a kixtart or without it.

btw.. Nice site you have.