Thomas
With W2k you will need the PIC Serial or a USB interface. The simple interface in the manual only works with W95,98,ME. Thank you MS!
If you have a PIC programmer a circuit and firmware is available in the FMS DOC folder. I can supply the above as complete units - see my website.
Does your transmitter have a buddy socket? Many have a 3.5mm stereo jack socket. Otherwise we will have to explore the circuit board for where to connect. The signal will be available somewhere! Also using the 10k input resistor on my circuits it is very unlikely that either the interface or your transmitter will be damanged if it is connected to the wrong place!
Let us know a little more about your transmitter and we will help you find where to connect.
Cheers
Mike