Well here is how you can "grab" the .cab file from an ".exe" for future use.
It works with most exe's I've checked, but a few it won't when the exe is installing more than the one cab file, but here is what you do.....
1. Hook up to activesync and start to install the the file from the .exe file on your pc.
2. Let it get to the point where your 6800 is asking if you want to install on the device's screen, don't do anything just leave it for now.
3. At this point the cab file is now on your 6800 in the following directory, just go there through your PC or file explorer and get a copy of the cab and your set (drag it to pc or copy it).
Directory on 6800 Windows\AppMgr\Install
Usefull if you like to have cabs on your storage card to reinstall with, no PC required.