Cebas technologies released a new iteration for his veteran particle system in 3ds Max. On this version 7.3 they turbocharged MEL, a new language scripting oriented for vfx introduced in 7.2.
MEL is multithreaded, accelerating every aspect of thinkingParticles. With this new language you will be able to access any part of tP customizing it for your needs and create your own tP nodes based on MEL.
For more information make sure to check cebas release note.