[Testbed-admins] Updating wiki for using Fedora 6 with SCSI disks

[Adit Ranadive <adit262@cc.gatech.edu>]

Hello,

I had an issue with booting the FC6 partition included with the generic 
image. The kernel would panic since it could not mount the root FS on 
the scsi disk.

To resolve this I had to recreate the initrd file by booting from the 
FC6 rescue disk.

If someone could update the wiki to include the initrd info that would 
be great.

Thanks,
Adit