First of all, read and resaerch there are many topis which are on this forum wich already answer your questions..
1 Yes
2. You do not need the 0800 disk if you are using stock firmware or you are using a VIA chipset and are using teh 10 second trick..
this tutorial will help you (
http://www.360mods.net/tutorial/HitachiSamsungTutorialV41Merged.pdf)
Ask no more, until you have read everything here and on the Xbox scene tuorials page...ask questions to g00gle, then if you still puzzeled here :p
giagbite - lol someone posted before me :p