Krismiller1982 Sorry to hear that, never tested the converter myself, never had much interest in the TX81z factory sounds, thats why I started to program my own sounds by the time I got the synth.
Yamaha UK provide some resources and product listings in PDF format for their Clavinova keyboard range.
Patrick provides his Cubase Mixermap for the TX7 but should work with the DX7 as well.