The cosmetic features that you told people to turn off will improve performance, but there are factors that could improve performance much more, such as the chipset on your video card and how much RAM it has onboard, the revision of the BIOS on your motherboard, the age and stability of certain drivers, and perhaps most apparent, having more than one device on the hard drive's IDE chain (if you use IDE for your HDD). If you have a CD-ROM drive or something hooked up as a slave to the HDD, expect noticeably slower performance than if the hard drive is the only device.
Also, SDRAM is relatively cheap now, and 2000 loves RAM even more than NT did, so don't go slim with the RAM. :-)
The 820 chipset and RDRAM do make 2000 much snappier, but RDRAM is EXPENSIVE! over $300 for 128MB.