Any way to make after dark work at reasonable speed?

I have after dark 4.0? And 10th anniversary edition. The 10th edition doesn’t seem to work well and replaced the classic savers I’m after. Some of the savers don’t work at all.

Anyway, after dark 4.0 works great, except the savers run at super speed.

Wondering if anyone has figured out how to slow down specific programs.

Dual pentium mmx 233
Windows xp sp3
Radeon 7500