Aux switch preset remapping

On my MC8 I have an aux switch connected to omniport 4, so controlling Presets L, M, N - but I want to start using the 2nd page on several banks now which means I have overlap using the 2nd page and external aux switch.
Using a different omniport is not possible right now from a cabling perspective - so would it be possible to change the mapping of the aux switches?