The runwalk_v1.zip file you have requested: Tools and Utilities / Scripts / CS: Source Runwalk Script - 0.83kb is not available. Perhaps try browsing all files for the game Counter-Strike: Source and upload any files you want to share or are missing. This is the only information we could locate:
This script turns the walk into a toggle to free up a finger. If you fire your weapon it will automatically start you running.