First off, Be sure to backup the files which this mod replaces -- some servers won't accept changes to sound scripts due to consistancy checks.

In here are modified cstrike sound scripts, modified so that:
- You may hear a lot farther than usual generally-- physics, gunfire, footsteps, shell ejections, the c4
- Hostages Now have footstep sounds :>

Installation:
Extract the scripts folder inside the cstrike folder.

I've used these for quite a while and tis quite useful -- especially if you're the last one standing.

Important Notes: VAC will NOT ban you for using this -- this is script mod; nothing that alters the executable itself (which VAC mainly looks for).