Just a follow-up to solving the problem of having all the game sound files being indexed by tracker and listed in media player when adding webos games to use with preenv. This method doesn't require messing with tracker:

I've found that if hide your webos game folder in MyDocs, it stops this problem completely so instead of using

/home/user/MyDocs/webos/

use a hidden folder (a dot in front of the name)

/home/user/MyDocs/.webos/

I use the visible folder webos folder for dropping in games I want to try and once I am happy it works ok, I move the game into the hidden folder and re-symlink the game files/folder in the home/user/webos.