This board is filled with the answers to all your questions. You should be able to find them using the search feature at the top of this page. For the umteenth time here's what you need for a standard hack of a V5 with the hard-drive mounted internally.
One hard-drive 2.5", 12.5mm thick or thinner.
An I-mod2 kit (easiest route). This contains a mounting bracket, a special IDE cable, a ps2 splitter(necessary to get into the BIOS settings), and all the needed screws and spacers.
A new BIOS chip, only available from Badflash as far as I know http://www.badflash.com/ Necessary to get the hard-drive to boot and the sound to work.
A Lasagna fan, or some other small fan mounted internally, necessary if you use the I-Mod kits.
One 2.5/3.5 adapter, necessary to initally set up the hard drive from a standard computer.(You can also do this in a Laptop if the hard-drive comes out easily)
A standard ps2 keyboard (necessary to get into the BIOS settings), a ps2 mouse.
The video driver (links on this board), the sound driver from the VIA website.
A special TORX screwdriver #8 I think. Necessary to remove the case screws (you can also use a small std. flat-blade screwdriver if you're very careful).
The VIA 4-in-1 driver off the VIA website, This solves many problems related to the chipset.
There are other ways to do this mod.....this is the #1 way....the easiest, and best-looking. The fan makes the computer much cooler than the stock heat-sink. Codeman has been having some supply problems, he also has a new I-Mod3 kit just shipping. You may be able to get all the needed parts from Badflash if Codeman is out. Remember....other people , including myself, have accomplished the I-Opener hack (hardware-wise) in other ways. Use your imagination......WinME and Win2000 pro are the easiest installs.