Creating Self Extracting Zip using Python

[Calvin FONG]

Dear all,
	Are there any utility that can be call by python to create self 
extracting zip file. I'm now using the powerarchiever. But the command 
line options aren't flexible enough. Basically, I would like to create a 
self extracting zip with default file path extraction and force 
over-write. The powerArchiever just don't let me call it unless I'm 
using the GUI.
	Any idea, experience and suggestion are welcome.
	Thank you.
-Calvin