5mb
Have you thought about getting a powered USB hub (£25) and an external USB disk (£80) and shift all your media files onto that.
Get more memory (£30) and install XP (thus overcoming instability) (£50 ?)
Remember to format the disk before you install XP (do not upgrade, but dump all your data to the external drive first.
For a total investment of £185 you will be hugely better off than now.
Just a thought.
W