Reinstalling ...and I forget some stuff that I USED to KNOW!

On a new machine now. Re-installing fs2004 from the ground up. So for some aircraft I need to put the old SOUND.dll into the modlues folder.
Then I need to do something in the fs9.cfg file so that fs2004 does not hiccup at having that old sound dll in there.
Something like "OldSound=1" or something like that.
Can't remember what gets added....or where exactly it goes.
HELP! Offical "Senior Moment".
best,
.................john
Then I need to do something in the fs9.cfg file so that fs2004 does not hiccup at having that old sound dll in there.
Something like "OldSound=1" or something like that.
Can't remember what gets added....or where exactly it goes.
HELP! Offical "Senior Moment".
best,
.................john