Will this memory upgrade work?

[delta99]

Hi there,

I am looking to order:
"Corsair 1GB (1x1GB) DDR2 PC2-4200C5 533MHz 200-Pin SODIMM Module (VS1GSDS533D2) [VS1GSDS533D2]" from ocuk

http://www.overclockers.co.uk/showproduct.php?prodid=MY-146-CS

I have a old laptop called NeoWare m100, was given to me by a friend.
Anyways, looking to upgrade the memory.

Current memory: Samsung 256mb 1Rx16 PC2 - 4200S - 444 - 12 - C3

Will it work ok? Many Thanks