Even another 64MB or so of RAM will certainly help pick up the pace, and I second the call for maxing out the video RAM.
OS 9.0.4 should be upgraded forthwith to 9.1, through the free download from Apple. os9forever.com will tell you how to get the rest of the way to 9.2.2
OS 9.0.4 should be upgraded forthwith to 9.1, through the free download from Apple. os9forever.com will tell you how to get the rest of the way to 9.2.2