Speedotite:
1) i've never had to reformat or convert my computer to ntfs, but from what i've heard, it is supposedly much more efficient/faster than FAT32 since it arranges data more effieciently or something along those lines, i'm not quite sure exactly, nor do i know what the DOS command is to reformat.

just make sure you do it.
2) this is the easiest question.

You dont really need Omega drivers, but it's highly recommended that you get them because the standard ATI Catalyst drivers sometimes have compatibility problems with the mobile chipsets whereas the Omegas usually dont, the Omegas are optimized/tweaked drivers that will usually make your system run a bit faster/better than it did before (i know from experience) and they include overclocking tools with the drivers if you ever decide to overclock your card. they can be found at omegacorner.com.
3)i have no clue on how to do this as i have never had a lappy before.

4)i believe memorystick regular and pro use the same slot, so u should be fine on that one.
Good luck and congratulations on your new lappy!