Hello,
I am completely upgrading my computer and need some help please.
Here is what I have right now.
ASUS Deluxe MB
EVGA 7900 GT/GTO Video card
Enermax 650w PSU
AMD Athlon 64bit 3200 CPU
4 IDE Hard Drives
Creative Labs X-Fi Fatality Soundcard
2 DVD/CD drives
4 GB of OCZ ram

Here is my new stuff
EVGA nForce 680i SLI 775 A1 Version MB
XFX GeForce 8800 GTS XXX Video Card
ENERMAX Galaxy Quad 1000w power supply
2GB of Corsair RAM Dominator CM2x1024-8500C5D
Intel Core 2 Quad 6600 2.40 GHz, 8 MB L2 Cache total, 1066 MHz FSB
Windows XP PRO
2 Western Digital 500GB SATA Drives
2 Western Digital 320GB SATA Drives
Creative Labs X-Fi Fatality Soundcard

1st. What is RAID? Is it easy to configure, Do I lose Hard Drive capacity, and if it is easy to configure what setting should I use and why.

2nd. I know that I am going from AMD to Intel and starting from scratch is the way to go from a driver stand point, but how do I transfer all of my programs from the IDE/AMD drive to the new SATA Intel Drive? I really do not want to have to re-install all of my programs. I realize some will have to be re-installed like soundcard drivers, video card drivers etc... but what about programs like Office 2007 and all my contacts and saved e-mails, I-Tunes settings.

3rd. On one of my other Hard Drives not the one with my Operating System I have a few games installed with a lot of addons for the games can I transfer this to my new SATA Drive without having re-install everything?

4th. And last (finally) Another one of my IDE drives I have dedicated just for music, all mp3's and a few I-Tunes videos, how do I transfer this to my new SATA drive?

Here is the configuration I would like to do.
One of the 320GB SATA Hard Drives used for the operating system along with my main programs mentioned above.
The other 320GB SATA Drive used for miscellaneous stuff
One 500GB SATA Drive used as my new music drive
The other 500GB SATA Drive used as my new gaming drive.

I realize this is a long post with a lot of info, but want to be thorough.

Thank you for your time and advice.