WARNING: Making changes to the Windows Registry, if done incorrectly,
can render your computer useless. Make sure ya know what yer doing.
The Good Stuff:
1. Go to regedit and browse to this key -
[HKEY_CURRENT_USER\Software\Google\CustomSearch]
2. Select the "Registry" menu and select "Export Registry File..."
3. Name it "customsearches.reg" or something like that
4. On the new machine (or profile), all you have to is doubleclick
that reg file in Explorer and it will import the settings. Viola!