many different user types, long running process, many scripts: what to do?

[Shea Martin <shea08@...>]

I many different scripts which will be run at various times. I also have 
many different user types which have to be registered before certain 
scripts run.

Is it best to create a VM, register the necessary user types and 
cfunctions, then run a script?  It seem redundant to define those user 
types and cfunctions over and over again...

Would I be better, to only ever have one VM, and run all my scripts 
through that vm?  This seems like a potential hazard with name 
collision...

Is there way to save on redundancy?  Any other suggestions? Performance 
is the real concern here.

~S