How do I change the housing on the Blackberry Bold 9780?

I own a black Bold 9780, but I really wanted to change the housing to white, so here are my questions:
- Is it actually easy to change it?
- Will the 9700 housing (the only one I can find to purchase online) fit my phone?
- Can you recommend me a good housing? (All the ones I've seen on Amazon have mixed reviews, one person says it's great, the other says it's rubbish)

Thanks, everyone.

Also, those of you who have WhiteBerry, does it get really dirty with time?

Answer:

it actually really easy to change the 97XX housing.
plenty of how-video's on youtube how to dissassemble/assemble your 97XX.