Welcome to the forums,
@Kiddo!
Can you explain what you mean by "my MOX8 programs"? Are they user voices, performances, songs, etc.?
I don't know if there are utilities that can convert, say, a MOX performance to a MOXF performance, but I know there are programs and apps for computers and tablets that let you edit and manage performances for various Yamaha synths-- Motif, MO, MOX, MOXF, MX, etc.-- so it might be that one of those would let you load a MOX performance and save it as a MOXF performance.
If you're talking about songs (standard MIDI files or SMFs), you might need to edit the Bank Select and Program Change numbers, and possibly some of the other messages-- SysEx, CC, etc.-- to accommodate any differences between the voices and effects on the two synths. The MIDI data lists for the two models should help immensely for seeing where any differences exist.