It's more intimidating than it is hard, if you have the square cup (binding post cup) I can help walk you through it. There are other options also, Bob Crites among others makes new replacement crossovers or you can send the crossovers off to bob and have them rebuilt. if you decide to do it yourself Bob has a crossover upgrade kit with Sonicaps, he charges around $50.00 for the kit, Bob is also of help if you run into trouble while doing the rebuild. Where do you live, I could help you if you are close to the Atlanta area. I would also go to the Klipsch Forum, there is a lot of info at this site. Let me know if I can help.
Phill