Ward Vandewege wrote:
and for more detail (shameless plug):
http://ward.vandewege.net/blog/2009/03/howto-replace-a-plcc-chip-with-a-sock...
It's not hard to do, even with moderate soldering skills.
Let me introduce you to a fantastic product. We have been using it at OLPC with great success.
[you will have to overlook the amateur web page but the product is awesome]
The issue most non-experienced (and even experienced) people have with SMT part removal is ripping off the pads due to excessive heat and force.
Chipquik is an alloy that drops the melting point of solder to less than 150 degF. So literally you can remove a part with a hairdryer. Its wonderful stuff. All you have to do is make sure that you clean it up good so that when you solder the part back on you don't have any chipquik left behind.