Commode 64 keyboard mapping

[DerHof2007]

I'm running Winvice for my C64.

For player one in my cabinet the joystick is mapped to the cursor keys.
Player 2 is mapped to number pad 2,4,6,8

For some of the C64 games when they are launched they include documentation that you can scroll through.
The problem is that you need the up and down cursor keys to do so.
This is an issue because for my P1 joystick to that uses the cursor keys to function I have to have 'Enable joy keys' ticked in the options.
When that is ticked the cursor keys do not function as keyboard inputs.
Is there a way to map the keyboard cursor keys to another keystroke so I can have to functionality of both of these options at once?
I can theoretically just click on options and tick/untick 'Enable joy keys' as needed but this isn't practical in a cabinet running the emulator at full screen.... and there is no keyboard shortcut to access this option in Winvice.

Changing my P1 controls is not an option at this point as it would affect all of my other emulators.