C64 / Plus4 Keyboard-Config

[Schattenwesen]

Hello,

how can I config the keyboard for the C64 / Plus4? (Plus4 is for me more important)
Where is config-file? Is it a ".vkm"-File?
I need to change some keys. I have a connector for my 2 Cometition Pro Joysticks. The connector simulates a keyboard, so i have to change the joyport-input from Vice-Emulator...
Can someone help me?

Thank you very much!!!!