I made some token changes to to the game. On mouse over undead are called "GodDamedVampires" ( A huge improvement IMO!), and keys stack to 120. Not bad for less than an hour with no prior experience! ftp://download.hugelaser.com/d2mods.com/files/resources/BeginnerGuide-v14.pdf shows how to start making a mod. You can find the programs you need to edit files at http://phrozenkeep.18v.biz/dload.php?action=search.
[EDIT] - Now Ive made a new skill!