RTPatch is worth a look also (many big corps. using it for their distributions)

w*w.rtpatch.com

look around the p2p networks for v7.0 (the easy way to find)

but I have to second the ClickTeam PatchMaker suggestion also (nice prog)

btw, Patchfactory?? (it's not a byte patcher if I'm not mistaken - I think you
can only distribute whole updated files with it - NOT update existing - despite the
misleading name)