To be honest unless you're really bad with a soldering iron, you can't really go wrong. Soldering iron, desolder braid (well it helps tidy up) and a solder sucker are a must.
PCB's providing you treat them with respect are amazingly forgiving to mistakes, so if something doesn't come off right straight away, don't keep going at it, just solder the pin back on and try again. It's when you start tugging and prising at components when things can get hairy. So avoid that.
Even though I've got a hot air station, and some other bigger tools for these with the through hole eprom's, I still use a very basic hand iron. It's superior for jobs like this, just a little time consuming.
Most of the pins will desolder easily. You will most likely find one pin a lot worse than the rest though, this is the negative connection and it's connected to a large ground plane which draws the irons heat away very effectively, this is the one to be careful with.
These msa11 ecu's are pretty much the easiest to work with in the 'ecu soldering' world, plcc32 aren't exactly difficult either but it's a lot more interesting
Thanks to tuner protection, OBD remapping is now on it's way back out of fashion, and it looks like in-circuit programming and a bit of soldering maybe is actually the future.
Anyway, the solderings the easy bit, you've then got to tune the file on the prom. That's an adventure in itself
