LOL, long story to tell but I "learned" to trim them "hard way".
I'm sure your friend can do it, too.
First few months - I got bitten, scratched, hissed(and then either bitten or scratched after that)...you name it, Ku Ku did anything and EVERYTHING to me to avoid it.

Then, I learned a couple of tricks for "happy medium" for both of us

1) Start "one at a time" when cat is in either sleepy or relaxing mode.
Try trimming 1, 2 or just as many without scaring him/her off. If she/he resists it or freaks out, stop immediately.
2)Do not even try when he/she is fully awake & alert, or in a playing mode - the chance is...ouch...
3)Although, I don't know if this works for every cats, I always give Ku Ku a little "treat" ONLY IF she lets me trim them(that is, without resisting or biting). I also praise her for being "a good girl" before giving any treat.
Besides trimmers, I've 3 different scratching posts - 2 verticals & 1 horizontal(to lay on a floor), which she uses whenever she feels like it.
There's several different kind of trimmers to try, too. My sister used regular nail-clippers(for human beings) for our family cats. I use scissor type trimmer for Ku Ku as she "resists more" than our family cats.
I also purchased a pedipaws, hoping it'd work as the TV commercial claimed it would, but Ku Ku never got used to it. She got scared off everytime I took it out and turned it on

I got 2 friends of mine who purchased it, too, but they both said the product did not work the way it advertised either.

Sorry for changing the subject but just FYI.
Good luck
