Yes thx TJT, but i already tried that a few months ago and it didnt work, kept saying "files (1.wav - 9.wav) not found". But i just got done fiddling with it again (for about 2 hrs lol), and i had an idea to create subfolder lrescue under samples, unzip the lrescue.zip file (files have different names than what the rom asks for, namely alienexplosion.wav, beamgun.wav, etc), and rename the 9 files to match 1.wav - 9.wav... and holy crap it worked!
Only problem was i didn't know which file should be named 1.wav and which one should be 2.wav... so thru trial & error i almost got all the sounds to match the game. Only a few weird sounds now: when my rescue ship is descending, it has the sound of the fireball lol, and when i get 500 bonus for rescuing all 6 dudes, it does some weird beeping, can't get it to work properly no matter which files i switch

Anyway, thx for replying!
~Aart