Hi Mr Shrimp,
The NRX2 isn't suitable for receiving the SSB RTTY the tutorial I wrote generates. However you can use a cheap SDR (Software Defined Radio) to achieve the same result at a fraction of the cost. There is a tutorial on this here : http://ukhas.org.uk/guides:sdr_tracker.
I sell modified EZCAP's on my online shop, come speak to us on IRC http://ukhas.org.uk/ukhas:irc_channel
Cheers,
M0UPU / Upu