Optional Throttle Assignments

As PMDG is currently working on the 747-8, I thought that this would be the perfect time to make a suggestion.  It seems that for quite a while there has been an ongoing problem with the use of FSUIPC to assign throttle inputs to hardware axes.  I was hoping that PMDG and Peter would eventually find a solution but it doesn't look like it will happen.  The only thing that has prevented me from moving all throttles assignments off of FSUIPC is that I am hooked on flying your 747 and I need the ability that FSUIPC gives me to assign multiple throttle inputs to a single axis (eg., 1>1+2 & 2>3+4). It would be great if PMDG could add optional menu item that would do this internally.  What do you think?