Call Jeff Fredette and give him your information, i.e. weight with full gear on and bike model. He can fix you up for about $60 I believe. You will not need any special tools. You just loosen the caps, then remove the forks. Take the caps completely off and drain the fork oil. ( I measured the amount of oil that came out and replaced it with the exact same amount.) Then you remove the nut at the top of the springs with a open end wrench (seems like its a 14 but I might be mistaken.) Remove the old spring and replace with a new one. I probably left something out as I tend to do that but thats the way I remember it. I like dealing with Jeff and he will answer your questions if he's not too busy.
Happy Trails,
Keith