Just put the NoIntro.ut2 into your UT2003\Maps Folder.
After that, open your UT2003.ini, and change the Following Line:
LocalMap=NvidiaLogo.ut2
into
LocalMap=NoIntro.ut2
and enjoy your Instant-Menu.
Extended Description
--------------------
This is a simple Replacement for the NvidiaLogo.ut2 from Unreal Tournament 2003.
Author's Notes
--------------
Hello Mom! o/
Copyright / Permissions
-----------------------
You are NOT allowed to commercially exploit this level, i.e. put it on a CD or any
other electronic medium that is sold for money without my explicit permission!
You MAY distribute this level through any electronic network (internet (web/ftp),
FIDO, local BBS etc.), provided you include this file and leave the archive intact.