Actually the tricky bit it the desoldering :)
That and to get to it you have to strip every part of the laptop apart, which if you've never done one before isn't all that easy (and then putting them back together is a good test of memory and dexterity!).... I've done loads and it's not generally something I'd suggest somebody attempt unless they are very confident in what they are doing.
Have a look on youtube first for some videos about taking laptops apart to give you a heads up on how some of the connectors work as some of them are very easy to break, and most of all take your time and be gentle, if something doesn't want to come apart don't force it, find what's stopping it.