Question: DB from SQL 2005 to SQL 2000

When initially trying to migrate SharePoint databases from the same machine that is running the whole FARM, I got this error:

SqlException: Too many backup devices specified for backup or restore; only 64 are allowed. RESTORE DATABASE is terminating abnormally.

Afer researching this, I discovered that it should work after upgrading the SQL 2000 engine to SP4 (as we had SP3). Over the weekend, we upgraded our production database to SP4. Then I tried the SharePoint restore to that production database again
(using stsadm -o restore -directory \\server2\disks\sharepointbackup -restoremethod new and applying the new db server name, server db and log file location, and then the new db names). The new error is:

SqlException: The backed-up database has on-disk structure version 611. The server supports version 539 and cannot restore or upgrade this database. RESTORE DATABASE is terminating abnormally.

If anyone else is having a similary issue and knows how to get around this, please post a comment or email me.