Have you used the special application to download daphne iso ? this one
http://ddl.pleasuredome.org.uk/ ?
Open the mgalaxy/data/Systems.xml file with notepad
change this line to have something like that (you can change path, but keep the same folder)
<System Type="Arcade">
<Name>Laserdisc</Name>
<AppPath>F:\emulateur\Daphne\daphne.exe</AppPath>
<RomPath>F:\emulateur\Daphne\vldp</RomPath>
<SnapPath>F:\emulateur\Mgalaxy\snapsemul\Daphne</SnapPath>
<VidPath />
<Emu selected="0">
<Cmd id="0" name="Daphne" value="%file vldp -framefile "vldp\%file\%file.txt" -fullscreen" />
</Emu>
<Extensions>.txt,.zip</Extensions>
<Active>True</Active>
<Script>True</Script>
<Database>False</Database>
</System>
This setup will work if you have in the Daphne\vldp\badlands folder the files
badlands.txt (framefile file)
badlands.m2v
badlands.ogg
The 2 lasts files are from this special version. I think you will have the same.
in the badlands.txt I have this file and folder
.
151 badlands.m2v