If you experience CPU lag / frame skipping / etc, give this a try and see if it gives you different values for the timer resolutions before and after.
Run BroodWar, then run timerInfo.exe. If the new cur value is lower, your CPU issues might be fixed. The timerInfo will need to remain open for the new resolution to remain set. If this does indeed fix the issue, I'll turn this into a Chaos plugin. If your old and new cur values are different, please reply with what they are as I'm curious as to how the default resolutions are determined.