You can download Ultra Hal text to speech reader Free from download.com :

http://www.download.com/Ultra-Hal-Te...-10329180.html

This program converts typed text to speech which you can then save as a .wav file. type the word you want in the box (I.E. CABLE ) and save by going to FILE and then selecting 'Convert text into WAV Audio file'. (save it to the desktop so you can find it or to the sounds folder in your metatrader folder).

In your metatrader go to Tools / Options / Events ----- scroll down to alerts and in the drop down menu select that file by clicking 'choose another' and select that wav file you saved.

Now when you restart metatrader and when an alert pops up it will play that wav file.

For different words and alerts, in the recent weeks Ive discovered Metatrader, I have had to download multiple MT4 platforms for each pair that I trade so that when alerts pop up, it guides me to that particluar platform I am running.

Hope this helps