Adding imports?

Hi,
   I was trying to do something I thought trivial. I want to load a
script into an interpreter instance, but I want to prime the interpreter
with import packages so the script doesn't have to. I tried
reloadPackages() with the 'new' packages the script will need, but that
didn't work.  Any tips? I want to avoid manipulating the script string
to do this. 

thanks!
Darren