[Python] how to run *.py in pythonshell on win98

Hi Group,
I have just installed python 2.2.1 and run my first hello world in a
dos-box with
python.exe d:\directory\file.py
It works, fine.
Now I want to know how to run file.py directly in the IDLE Python
shell. I cant find an answer in the FAQ or elsewhere, maybe it is to
simple or i am not looking in the right places ...

Thanks in Advance
Markus