kevindelaney,
To add RAM you should not need to open the case. There is either an access panel (with one or two screws) on the bottom of the notebook or the RAM is accessed under the keyboard (which is held in with small retractable plastic clips).
Since that computer only comes with 128Mb of RAM you want to get a 512Mb SODIMM if you are running WinXP. You will see a huge improvement, since 128MB of RAM just chokes WinXP.
I am sorry I cannot be more specific on where to access the RAM but I have not seen that brand of notebook before.
Take Care,
Richard