using taskset within a PBS job

Hello

I have a script which do the following:

compile an mpi executable
launch it.

I want then to lock these executables in CPU with taskset.
Is there a way to do it easily?

ex:
a user launch a job: there is 3 process on 2 nodes called out.exe
another user launch another job on 3 nodes and 4 ppn, call out.exe

Is there any builtin in torque which can help me, or I should write a 
shell script to wrap all the taskset?
thanks