I think your database is not really corupt, It seems that it wants you to run re-installation of sql 7 again(everytime you change name to a server). It is ok, just do it, and then after a couple of minutes it said, Finish. You then could connect to your database. Besure to redifine your local server name and then reboot.
select @@servername will give you your old server name.
After the reboot, it will give you the new server name.
Good luck.