Oh the eternal question, should you let Windows manage the swap file or should you set it. Windows 98 is designed to use RAM, and should page memory contents to the
swap file only when the demands for physical RAM exceed what is available.
click here click here for so called tweaks, these will let you reset the page file but I would use Ctrl Alt Delete to see what apps and possesses are running first.
If you Right click on MY Computer and go to >properties > Performance > virtual memory and change the setting form letting window handle it to letting you customise you can set the page file yourself, this I think will not help.