bdist_wininst strangeness

[Dominic]

I have written a distutil setup.py
and a post installation script for
windows, which places a shortcut
on the desktop.
Everything works perfectly,
a minor nuisance is the fact
that temporary files are
left on the source drive
e.g. d:\s3vvlaa9 etc.
Usually they are empty, if
I print from the post-installation
script they also contain this
text.
So how can I get rid of those
temporary files?

Thanks,
  Dominic