Short answer - No

Longer answer - the Line 6 Guitarport used completly different modeling hardware and software. In addition the amps and effects are different. The current range of Pod HD technology cannot use tones from any of the earlier equipment. For example the XT, X3 & guitarport etc.

I understand your frustration but to be honest if Line 6 had maintained backwards compatibility the development of new hardware would effectivly have been halted.