We can't add or change perks. I don't think it's possible to add new kinds of ammo either, I didn't mange a few days ago at least.
We can add new music but what about new sound effects? We can always change old ones, but adding new ones?
Has either the mapper or the game worked as they should on the computer that you're using?
Since both the mapper and the game doesn't work you could try everything that would make the game work (check out the interplay forums etc.).
Have you done anything with direct x? I think there's a...
How did you make the frm files? If there is a lot of "invisible color" in the pictures the actual position of the object in the game may change or end up where you don't expect it.
EDIT: Didn't notice the above posting..well..
I got another question, what are we allowed to do? Are we allowed to change, reverse engineer, the fallout exe-file? Has Interplay said anything about this? If not, don't one break a bunch of copyright laws when one distribute a modified fallout exe-file?