Never heard of xboxplorer. If you mean xplorer360 then I'll just say that it is useless. Never heard of the Datel tool. But, I'll assume that it is a paid application so I probably won't go that route.
FTP between Avalaunch and Avalaunch is working well enough. I'm getting 9.6MB/s average so far. No need for QWIX since I don't keep XISOs around on my computer. (Now THAT is a waste of space...
Edit: Added pic. I'm through the B's now and onto the C's.
Funny thing though, Avalaunch gets Malloc errors when in HD mode, so I'm back to good ol' 480p for this transfer. Not sure what the problem is. When I get a break I'll recopy the install and see if it gets the same error.