I suggest you all give this a try and see if you can utilitize your grenades better. One thing is for certain, you will be able to concussion jump much easier with this addition.
(1) Download the wav file from here. (gt.wav)
(2) Place that wav file into the /quake/id1/sound directory. You may have to create this directory yourself.
(3) Now, you have to bind it to your existing setup. Here is a small sample cfg file. Basically, you'll need to add these lines to your autoexec.cfg or your primary called cfg file within your fortress directory (do not put this into the config.cfg file... that file changes after every use of TF!)
example: I use a file called tf.cfg that is automatically executed by
the autoexec.cfg. I added to my tf.cfg file:
bind e +tgren1
bind c +tgren2