[GreenKeys] Need help with a RTTY demo setup

[Buzz]

Greenkeyers,
I'm attempting to setup a rtty display and I'd like to use a laptop =
computer to send .wav or .mp3
audio to a military MD-522A TU.  I've been surfing the web and found a =
few psk31 programs with rtty
capability but nothing that will save to .wav or mp3.  So I guess i'll =
have to feed the audio back
into my desktop to create the audio file.
Can you recommend a SIMPLE rtty program that uses the sound card to =
generate the tones?
  I need 850 or 85 hz at 60 or 100 wpm.
Do you know of any available .wav or mp3 files?
Do you have any other suggestions?

TIA,

Buzz