Below are all of the links to a specific How-To or Tutorial for editing the .smc file. Remember, this file is the Super Nintendo version of the game. You can download the Smc file here or on the downloads page. If you are new to editing, make sure you read the main editing page first.
I'd like to start getting info here for Snes guys. For starters, there is an Snes editor which can be downloaded here: Snes_NHL94_Editor_JG.zip. This editor can cause problems if using a ROM you've already edited in a hex editor.
Also, here's Xstioph's Corner forum thread which has some useful Snes info: http://forum.nhl94.com/index.php?showtopic=4213
We will try to get some more infomation here, but at least there's a start.