First of all, read and resaerch there are many topis which are on this forum wich already answer your questions..
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