python libraries (pyserial) and runtime

Hi, I’m running pyserial to talk to a custom controller, and everything is working just fine from within blender. However, when I export to runtime, the program cannot import the library. I get “ImportError: No module named serial” in the terminal.

I’m using:
OSX 10.5.5
Blender 2.46 compiled with python 2.5

Is it impossible to pack these libraries into the runtime? I’ve read some posts that seem to imply that, other posts that suggest you just need to put the right files in the right directory. So far, putting a lot of my pyserial files in various directories in the runtime app has not worked.

Many thanks!