OK, I understand what you're asking now. Let me lay it out for others in a more recognizable form. In SS2 there are three speeds of movement.
The bind file has direct binds for Run and for Walk slow.
The OP wants to use the middle speed, which is NOT the same as the 'Walk slow' speed. The only way (from within the game) to get that speed is to press your RUN button while holding down the speed toggle key.
I did some tinkering and found a way to do it. You need to go to the BINDS directory in your SS2 install directory. Now you will see a list of "cfga0000.bnd" files. If you just want to modify the default keybinds, open up the 0000 file with notepad. If you already have a custom bind saved, open each file and at the top will be the name of the bind file. Find the one that is yours.
Find the "bind w" line (should be in alpha order) Change the bind to...
bind w +walk
Save file, run SS2, then go customize controls and select LOAD, then select "default" (or the one your custom file above). Now in game you should have that 'middle speed'. I tested it and it works. Let me know if you can get it to work. (feel free to rate my post if it was helpful)
Post edited February 27, 2013 by Savant99