Apparently the TheaterTek software can shift the 2.35 image up and down within the larger 16:9 frame, so you should be able to get rid of the need to shift that way.

I find computers work pretty well if you don't mess with them. I'm hoping that extends to my hypothetical HTPC


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8