Ok,
I reallllllly need some help here .
I desperatly need to interface a 4x4 matrix keypad to a ps2 port
on a PC, the buttons will mimic some of the numeric keys
 on a keyboard so no special function is needed there.

can I use a chip from an old keyboard, a PIC, or some other
 IC to do this?

It will be the only keypad/keyboard device hooked to the PC,
so it needs to be able to boot of of it.  I was thinking that a pic
could work somehow, or maybee salvage the insides of an
 old keyboard??

any ideas?

Regards,
Ryan