Modified autorun.inf file

I modified the autorun.inf file provided to include "Launch Portable Thunderbird" in the list of programs that XP displays in the autorun window. It's one less click you have to make to run PTB!

[autorun]
open=PortableThunderbird\PortableThunderbird.exe
icon=PortableThunderbird\PortableThunderbird.exe
action=Launch Portable Thunderbird