J,

You may want to check out Slim In 6. The nature of P90X is to lose fat along with building muscle so your goal is actually counter intuitive towards the way it is designed. SI6 was created especially for women who want to slim their muscles in order to have a more traditional "female" body. By working the same muscles every day, rather than having rest days (dusguised as cardio routines) in between, you actually slim out the muscle rather than building it up. This does not hurt the muscle but it does make it smaller over time.
Hope this helps. Let me know if you have any further questions.


John

More...