You are not that far behind. CPU and bus speeds made quantum leaps these past 2 years (I figure all the chip companies had this speedy stuff on the shelf, but the economic down turn made them push it all earlier than they would have normally).
Additional memory would be my only recommendation (if you can get it cheaply). If you currently have one 256 Mb, see if you can find another 256Mb, Crucial or Kingston for < ~$50. If you have 2x128Mb, then replace both with 256's. With Win2K and XP 512MB - 1GB Ram seems to remove most of the use of hard disk for virtual memory (pagefile.sys = the big speed killer). I just bought 3x256MB PC133 SDRAM for $40 per.
Additional memory would be my only recommendation (if you can get it cheaply). If you currently have one 256 Mb, see if you can find another 256Mb, Crucial or Kingston for < ~$50. If you have 2x128Mb, then replace both with 256's. With Win2K and XP 512MB - 1GB Ram seems to remove most of the use of hard disk for virtual memory (pagefile.sys = the big speed killer). I just bought 3x256MB PC133 SDRAM for $40 per.