Keyless Entry Wiring Help!!!!

I recently bought a keyless entry system (TRC model #90-911A) from ebay and I need some help with wiring it up correctly! It is to be installed in my wifes 2004 Kia Sedona minivan which already has the factory power locks but no keyless. I have installed a few car stereos in my day but this will be my first keyless system. The system came with a basic wiring diagram but it is too generic for me to follow. If anybody has any info on how to properly wire this thing up that would be great!!