My mare had some trouble picking up her front feet as well. It was because what she was standing on was not even. As soon as she was on level ground, she would pick them up. I also say to her "foot up" when i have run my hand down her leg. Im assuming you know how to pick up feet. It has worked very well, where all i have to say is "foot up" and she'll pick it up. I also say "foot down" when i put it down and reward her, first with treats, then with just a pat and saying "Good girl".
My boyfriend's gelding also has trouble picking up his feet. He would let you pick it up if he was eating hay or something. That worked well as it took his mind off of what we were doing. My boyfriend also used "foot up" and "foot down" and that has worked well aswell.
If you want, ask someone to be the treat dispenser at her head as you pick up her feet. To start, i would say just pick them up, hold them for a second or two, then put it down. One she realizes that nothing bad is going to come out of it, she shouldn't have a problem when you have to pick it.
This is going to take time, and if she doesn't cooperate, take a breather, walk away if you have to, and come back with a clear head. If you get frustrated, she'll sense that and in turn, she will get frustrated as well.
I hope this helps Green Jasper. Keep me updated on how it goes, and if you run into a problem, i'll do my best to tell you how to resolve the problem. :)