Convert mouse buttons to keyboard keys?

Is there a program that can convert my mouse 3, 4, 5 buttons so that it activates a corresponding key simultaneously? TIA

i can add that to keyclone fairly easy (i believe)... after that, you would tie the button press to a hotstring, and on the other clones you would associate with hotstring with a key to be pressed.

if you also wanted the active to also trigger the key... well.. i'd have to work on that a bit (doesn't currently work that way... but could)