Hello Ruben
if you are using the tam electronics, i think the only way to change sounds is to use an external & dedicated sound card like a Beier (USM-RC or USM-RC2, not the USM-HL) or a Benedini. With this card, you are able to use all your own sounds. I did this on both my tanks, using records from the "real thing" (on youtube you will find several videos from where extract the sound)
For example, the current profile running on my KöTi (Beier USM-HL) you can see and ear here
http://www.rctankwarfare.co.uk/forums/v ... 23&t=10384
best regards