OH so the onus is on ME, why Spotlight is not working?
I should be doing the work here?
Did you really want help or just to be act like a jerk?
If you're not getting the right results from Spotlight, the index is likely corrupted. If Spotlight knew the index was corrupted, it might be able to self-correct. You normally don't have to do anything with the index.
If you didn't see the little dot in the Spotlight icon, shortly after removing the hard drive, then it didn't start indexing. Put the hard drive in the list, wait a bit, then remove it. You should see a dot in the icon and if you select the Spotlight menu, it will say that it is indexing.
If it is still not reindexing, then you might try forcing it with the command line command listed here:
If you are still not getting the correct results, there may be a problem with the permissions on the drive. Try opening Disk Utility, select the Disk, and choose Repair Disk Permissions on the First Aid tab.
And, before you fly off into another fit of hyperbole, no, you don't normally need to repair permissions, either.