with mytheatre, i think you have to install/put mdplugin on your plugins subfolder, then put the rest of the "plugins" file i gave you on the mdplugins subfolder. then replace the rom.bin with the one i provided (they are identical files so you may use any of it).
for easier use, download progdvb, install it, and dump all the files i gave you on the progdvb/plugins/ subfolder. make sure nagrakey.txt is on progdvb/plugins/nagra subfolder, ok?
if that doesn't work for you, then i dunno what else will.