Disclaimer: I'm not experienced with this at all and don't own a gaming keyboard. I have seen em before though
ACR lets you use F1, F2, and F3 to Fold, Call, and Bet/raise.
I'm fairly sure most gaming keyboards let you remap keys to other keys. You could make these buttons in a more preferable location (like on the arrow keys or something)
I have ACR set to pop up tables when it's my turn but it doesn't make the popped up table active. I'd imagine you could write a script or something that would let you select which table you wanted active and use the Fold/Call/Bet options solely with the keyboard.
Is this what you're asking about? I've been thinking about trying to find a way to avoid using the mouse and solely use a keyboard to make my moves.
I think everything I said here could also be accomplished with AHK scripts(Autohotkey).