addon domains

[ash]

can i only install firerift in the root directory? I've tried
uploading it in an addon domain and went through the install fine
untill itsent back a fail in the db which is odd as I used exactly the
same db as when i tested it.

I did however run the test in the root, should i run the test in the
addon domain instead also?

I don't have a clue about this kind of thing so any help would be much
appreciated,

Thanks,

Ash