1) you can use pogo pins on the 1.0 but not on the 1.5 so if u have a 1.5 u have to know how to solder
2) some people have no trouble with the pogo pins and others do, i myself had trouble with the pogo pins so i just soldered the wires
3) if you can get the d0 lined up with pogo pins then u should be alright
4) you can put a game into your xbox and back it up onto ur xbox's hd and then you wont need the disc to play it again.
5) #xbins on irc has just about everything you can want
6) all depends if you get everything lined up with the pogo pins, it can be real quick and it can be real long and a pain if u cant get things lined up
7) dont think it matters about the 2mb your bios probably wont be that big anyways
yes you can use the executer bios its what i use with my xbit