Yes, you need to find the exact WM5 AKU that you were using. I think VZW had a 2.2 and a 3.3 AKU. Did you try the VZW WM5 ROM from UTStarcom here:
http://forum.ppcgeeks.com/showthread.php?t=27123
I think this is the 3.3 AKU here:
http://support.vzw.com/how_to_use/xv...re_update.html
You can't use the PIM.vol to backup contacts unless you are just recovering from a hard reset. Syncing would have worked or PIMbackup that runs on WM5 and 6.