There’s an easier way to make Spotlight really search for all files:
1. Open up a new search window
2. Add a new search criterion (a drop-down menu should appear saying “Kind”)
3. Open up that menu, and choose “Other…”
4. In the opened dialog window, find and select the entry called “System fles”
5. Click OK

Now you can perform a search that will include system files.

If you want this option to be always available from the search criteria menu, at the step 4, check the box to the right from the “System files” entry (the “In menu” column)

There’s an easier way to make Spotlight really search for all files:
1. Open up a new search window
2. Add a new search criterion (a drop-down menu should appear saying “Kind”)
3. Open up that menu, and choose “Other…”
4. In the opened dialog window, find and select the entry called “System fles”
5. Click OK

Now you can perform a search that will include system files.

If you want this option to be always available from the search criteria menu, at the step 4, check the box to the right from the “System files” entry (the “In menu” column)

Excellent!

Excellent!

Your method works in some cases, check this one if you're not successful with that one.
http://trikks.wordpress.com/2010/02/03/uninstal...