k series upgrade

[reaper30]

hi all, i want to upgrade my k series vaio.
i have found out that i can upgrade the memory from 512k to 1024 by inserting an extra 200 pin sodimm 512k card am i correct?
i want to upgrade my hard drive from 40gb.
i have been told i can put in up to 100gb and i need a 2.5 inch hard drive is this correct?
i have seen a couple whilst browsing and the seagate and the toshiba look to be ok.
if i install either of these do i need to download any updates for my bios?
and help/suggestion or advice is much appreciated.
thanks in advance
reaper

[reaper30]

:smileygrin: ok so here is what i have decided on:
2 x sodimm memory cards
1 x Toshiba MK1032GAX HD110 100gb hard drive
if any one prefers the seagate or the fujitsu instead please feel free to put forward the pro's and cons lol:smileydevil:

[kee-lo_]

Hitatchi have better power consumption