zipfile doesn't compress very good, are there other solutions ?

[Stef Mientki]

hello,

I want to make a distro for Ubuntu,
and run under Windows.

I packed all sources with zipfile,
but the compression doesn't seem to be very good.

If run the created file through 7zip, it becomes anout half the size.

Is there a way to accomplish the same task with zipfile ( the 
documentation isn't overwhelming).

thanks,
Stef Mientki