What Are These??

As per your specs, you have mentioned the RAM details. DDR2 - 1GB in size.

Alternatively, Start - Right click Computer - Properties. There shows the RAM size.
Simple shortcut,
Windows Key + Pause Break.

Ok I found out that I have 2x 512Mb sticks. The type is DDR2 and manufacturer is Samsung.
I would like the best memory my laptop can hold but for as cheap as possible. Might be a little bit of a challenge hey aha