Create simple Windows keyboard driver

I am looking for someone, who will be able to create simple (even demo) Windows keyboard driver, that will be able to modify pressed key on keyboard. The final goal is to create secondary keyboard with user defined layout. Just imagine that I will connect another numeric keypad and I will need to interpret 1,2,3 as A, B, C... (for example) I tried to google the topic and I probably need upper class driver (not sure). I need this features: 1. Must work for USB keyboard. 2. Can be keyboard driver OR keyboard CLASS driver. 3. Key translation can be specified by keycodes, scancodes, asciicodes or whatever is needed. 4. Translation table must be somehow configurable, not hardcoded (registry, config file, etc.) 5. Must work on Win7 and above 6. It must work with two keyboards connected simultanously 7. In case it is CLASS driver, it must be able to distinguish which keyboard the key press comes from. Thank you for your offers.