Then OSC will suit your perfectly (you can just use your messages through sockets, if you don't want to use OSC, but I like it personally for many reasons).
Just have one pd sending OSC messages to the other through a port. There's several issues regarding serious sync, but if you feel that its do-able in this easy way.. gor for bingo (as we say in portuguese).
best regards, Pedro
2010/8/17 João de Brito Rocha Reis Vidigal jbvidigal@gmail.com
One to control sound the other to control video (GEM).
"(your OS can tell you in which CPU a process is running, there are several cmd tools in linux for that)"