to keep things simple you might simply:
1) let user specify a filename in the user variables where the result alias will be found
2) let user specify a score to be applied to all of the items, but then return the results such that farr can add its score to that score.
actually now that i type this out, perhaps this would be best implemented in core FARR functionality..
perhaps what i should do is make it so that if you type +ALIASNAME it will *add* the alias contents (including obeying a #filecontents) into the current search results (with their configured score), but *not* to the exclusion of other searching. i think that would accomplish what is desired.