How hard is it to install your own engine (bolt-on and play such as H22 in an Accord)? I'm not exactly the best mechanic - hell, I went to a shop to have my header put on, but I want to learn, and one of my uncles had to fork out $1,000 for a new engine to be installed into his Subbie!

So, how hard it is and what tools outside of the standard nuts/bolts/screws/drivers/wrenches would I need for this??

Thanks!