Depends on how much money you want to spend.
For ~£25 you could buy a 2Mbyte PCMCIA SRAM card and run most of the WHDload games from hard drive.
What you'll see is workbench speed improvements, disk access will be a lot faster and so will window refresh etc.
If you don't mind how sluggish the UI feels when starting the games then just get a PCMCIA SRAM card.