Creamware PowerPulsar and Pro Tools LE
If you have an MBox I'm affraid that there's not much that you can do (outside of mixing the two audio cards together in an external mixer). If you have a 002 you could simply run the ADAT from one to the other and back, and setup external sends and returns using aux channels. This would give you the abillity to send audio to the pulsar, and receive it back. Then all you'd really need to do is tell protools to use the pulsar's MIDI interface. The rest would be just a matter of audio and MIDI routing.
Good Luck,
Stuart.
Good Luck,
Stuart.