Two things:

1. I know that BOSS equipment is enticing due to the seemingly endless feature inclusion and the ridiculously low price BUT-you get what you pay for. Boss, Pyramid, etc are all "flea market" sub WalMart quality junk. Their failure rate is out of this world and by the time you get done pulling this thing back out and purchasing a replacement, it will have cost you more than if you had just purchased a better quality piece in the first place. I understand better than anyone how important budget is (I own a shop-my entire living revolves around this economy and the consumers decreasing spending budget). However, save a few more bucks (wait a couple more weeks or whatever you have to do) and get a better piece of equipment (Pioneer, Kenwood, JVC, etc). Not a week goes by that one of the local high-schoolers comes in here having us install some flea-market/eBay crap. We take bets (sometimes in front of the customer) on how long it will last (I usually win the bet-they come back in less than a week). This is no exageration...

2. Kia's are snap together cars. You take a right angle pick (or a butter knife for you shade-tree'ers-"1stGen7" j/k), and insert it between the bottom of the radio panel and above the AC panel. Pull it towards the rear of the car gently and you will disengage the two clips that hold the bottom in. Then just work your way around the cover and it all pops out. Takes seconds.

The only thing I am unsure of is that I don't remember many Kia's with the wood surround so that may have to pop off first but I don't believe so. You can remove like ten screws inside any Kia and the whole interior pops out. Quite user friendly...