I have chronic lag spikes, and the doctor can't suggest anything for me, so I did some research and found this place. It's not a cult or a scam!
https://forums.daybreakgames.com/eq/...ion-guide.956/
It's so far a good resource for messing with your settings to reduce lag. (It took me a while to figure out, but the "Everquest/Station Launchpad" mentioned is the first screen you get when opening EQ, with the options to login or do other things.) Obviously some stuff doesn't apply to P99, but most does. Sadly, the option to adjust frame rates is not available.