usb keyboard emulator

i need an interface that will emulate a USB KEYBOARD. i need an interface from a project board that will talk to the interface to send keyboard data to a pc USB port. You will supply the interface either in design or off the shelf modules. I can make PCB from your design if required. Simply stated, my microcontroller will send either serial or parallel data to your interface,prefer ascii string input. your interface will take ascii string and convert to keyboard emulation on usb port. The PC will see your interface as a keyboard. use on windows98, win2k and win xp. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform win98 win2k win xp