I use the FCB1010 foot controller without any modifications or different ROM/EEPROM.
There are two foot pedals on the right side for variable control which can be assigned to your virtual instrument.
I assigned one for the balance/mix between the VST/Guitar so I have more than one instrument for each assigned foot pedal button of the hundreds of available assignments for presets the FCB1010 can switch in Midi Guitar 2.
The other variable pedal is assigned to a typical synth mod wheel. I like to use it for Organ Leslie speed control most often but it can be used any way one chooses and of course depending on the synth options.
You can program the variable pedals to control CC’s (continuous controllers) for midi.
The user manual is basically useless except for basic operation but I did find a useful youtube video so here it is:
PS. Absolutely no problems with the FCB1010 so far.