How to extend sys.path on Win9x permanently?

[Martin Bless]

Python20, Win98, PythonWin

(1) I'd like   Python.exe/DOS    AND   Python in PythonWin   to start
up  with an extended sys.path, having my own lib added,  as if a
sys.path.append('c:\\mylib') had already been performed.
How can I add the extra path permanently?

(2) Here's what sys.path is on my machine. Where is this defined?
Registry?
 *.ini?
Hard coded?

sys.path
['', 'c:\\programme\\python20\\win32',
'c:\\programme\\python20\\win32\\lib', 'c:\\programme\\python20',
'c:\\programme\\python20\\pythonwin', 'c:\\programme\\python20\\dlls',
'c:\\programme\\python20\\lib',
'c:\\programme\\python20\\lib\\plat-win',
'c:\\programme\\python20\\lib\\lib-tk']

(3) I'd hate having to put something like "set $PYTHONPATH=..." into
AUTOSTART.BAT, since DOS environment space is very limited.

[... and besides, this new WinMe on one machine  dismisses all changes
I make to autoexec.bat und reverts  to the previous version the next
time I reboot. How can I change this behaviour?]

thanks a lot
Martin Bless