I'd say the best capturing software is Avidemo. There is also ***ory (dickstory) but that is very hard to use. I'm not sure about this because i can record Black Ops at full 1080p quality...
And for editing Sony Vegas is the easiest to use. Just torrent "Vegas Pro 10"
If you want to make cool effects and flares you should use After Effects but that is quite difficult to use. So start of with Vegas Pro. Here is a link to a torrent for the 32 bit, the 64 doesn't work. Sony_Vegas_Pro_10_x86-x64_Cracked-TL Torrent - btjunkie