Did some more poking around.
If you have not seen these they will be helpful. Data sheets for the actual chip on the modules.
http://ww1.microchip.com/downloads/e...Doc/70090a.pdf
http://ww1.microchip.com/downloads/e...Doc/70091a.pdf

As you know the transmitter is programmable and it appears that both modules are pre configured for ASK modulation.

You can find out more about modulations here.
http://davehouston.net/RFTipsTricks.htm
Dave has a whole lot of good info on his site.
http://davehouston.net/

Looks like you can use pin #11 from the receiver module to connect to any PIC for serial data so the code that Bruce posted can be used.