Here is the link to Sprint's Stock Rom......
http://forum.ppcgeeks.com/showthread.php?t=42741 If your having errors with Sprite then try SPB or even HTC Backup...
http://www.freewarepocketpc.net/ppc-...ta-backup.html I haven't tried HTC but Spb didn't work for me but maybe you will have better results
Are you using the latest version of Sprite? I am not experincing any of these errors you speak of. Matter of fact I just restored my phone with Sprite and had ZERO problems