I'm not a fully fledged DBA, but looking at the scripts I'd assume that a scan density beloew 75 percent is bad.

Ken England has a good book on "Microsoft SQL Server 2000 Performance Optimization and Tuning Handbook" which I'd recommend (ISBN# 1-55558-241-9). And then searching for DBCC SHOWCONTIG in Google should give you some more information at what to look for.

Regards

hot2use