Hi BHawk, here is an article on repotting a cattleya orchid. How to Repot a Cattleya
There are also other articles on repotting cattleyas in the Orchid Article Library here in OrchidTalk.
I recommend dividing this orchid to clean it up, but if you just want to repot, still follow the advice and skip the part on creating divisions. Good luck and please post if you need clarification on any step from the article.