Saw this over at PCStats.com http://www.pcstats.com

For Win98/ME users, there is quick way to boost overall system performance with just a few clicks of the mouse and taps of the keyboard!
First click the Start menu then select the Run option. Inside the box type sysedit and press enter. Press enter and you will see quite a few windows open in the System Configuration Editor.

Select the SYSTEM.INI window and from there scroll down to the [386enh] section and add this line under that header; Conservative Swapfile Usage=1 (with NO spaces between the words). Save the changes and then reboot the computer.

What this little tweak does is force Windows 98/ME to use up all the physical RAM first before accessing the swapfile on the hard drive. With this small tweak done you should notice that all your programs have a little more zip in them! =)

Source: http://www.pcstats.com

Oooolldd tweak, but a good one.