Please have a look at these internet sites:
The UIR sends 6 bytes to the PC which represent the pressed button
http://www.geocities.com/SiliconValley/Sector/3863/uir/
The UIRT is an extension on the UIR. This device can also transmit IR.
http://people.a2000.nl/rwvgesse/
The IRMan is almost the same as the UIR, but you don't have to build
it yourself.
http://www.evation.com
Within a few months we (company Argolis) will also release a product
that can receive/transmit IR remote data and is also capable of SIR
(Slow IRDa). The firmware of our product can be updated at home.
http://www.argolis.com
Regards,
Ad van de Laar