yep, what i did is took the gif package of fren and added the missing files from the original package from shoopity and i got no no file found anymore, and i hope i have the all the latest gif like this
just tested the posted version, really nice update since my latest, i didn't know shoopity already improved some parts, some videos have changed and some are added, and fren's enhancements are a must have 
to enable bumper to contactors, uncomment the lines in bold in the script
'**************
'* Bumpers
'**************
Sub Bu1_Hit() 'Switch 46
DOF 105, 2
Playsound SoundFX("fx_bumper3")
PopCheck()
End Sub
Sub Bu2_Hit() 'Switch 35
DOF 107, 2
Playsound SoundFX("fx_bumper3")
PopCheck()
End Sub
Sub Bu3_Hit() 'Switch 45
DOF 106, 2
Playsound SoundFX("fx_bumper3")
PopCheck()
End Sub
and for the sounds, i tried with lmemdoftables txt to 0, 1 or 2, and i have no sound disappearing problem..