Upgrade your notebook hard drive. 120Gb SATA $99 or 160Gb IDE $89 @ Netplus
Changing the drive is quite painless on a Dell, consult the manual on other makes.
The 2 above are ok prices but with free delivery saving around $20 they start to look good prices.
120Gb Samsung SATA 2.5" Notebook Hard Drive, 5400RPM 8Mb Cache HM120JI $99
160Gb Samsung 2.5" Notebook Hard Drive, 5400RPM, 8Mb Cache HM160JC $89
They have a 160Gb SATA listed for $99 but no stock so maybe wait for them to arrive if thats the size you need.