One free program to rebuild your desktop is Tech Tool Lite: http://hyperarchive.lcs.mit.edu/Hype...l-lite-304.hqx

As far as the crashes, you probably need to use a MacWinLin version of Basilisk II to troubleshoot your extensions. I would remove all extensions and control panels out of the system folder that deal with networking (A/ROSE, OpenTransport, AppleTalk, File Sharing, etc.)

It's also a good idea after having a crash to boot up off a second hard drive file and use a disk repair tool to fix any errors on the first hard drive file. Otherwise you will continue to have crashes and errors until you repair the file system.