6,000 cycles isn't very high. The most demanding DOS games run in DOSBox require 50,000+ cycles at least.

Since you didn't mention your system specs or the game we can't really suggest much except to use the latest version of DOSBox which is 0.73 which should automagically run the game at a fast enough speed.

I have a powermac G5 , and the newest version of dosbox.

I am pretty sure it is running dosbox at the highest speed too, it says 'max' on the top toolbar.

The game is Phantasmagoria 2, and I do not understand why it's running slow.

Would a frameskip help? (it's the video that is lagging)

Try making ISOs of the CDs.

Already did that, they are all copied to my hard drive.

I ran Phantasmagoria1, Gabriel Knight 2 (both are heavy FMV) without a problem. For some reason PH2 is acting up.

Aren't the system requirements for Phantasmagoria 1 and Gabriel Knight 2 much less than Phantasmagoria 2?

and AFAIK DOSBox on PowerPC doesn't use dynarec (dynamic core).

If you can drop the resolution or FMV size that may help if not then your only solution would be VPC or the like instead of DOSBox on that computer for that game.

is VPC another dos emulator?

Thank you again DOSfreak, you are helping me out lots.

And I absolutely love Dosbox, its like a dream come true.
(everyday i thank god i havent thrown my games away)

ah, virtual pc...

i will give it a try.