If you scroll down on this page
http://arduino.cc/playground/Main/InterfacingWithHardware#Communication
to this section:
Wireless... including radio-less "wire-less"
you will find links to HopeRF modules. Start there, perhaps you can use as-is if the SPI interface is the same between modules and only the frequency is changing. And if not, the link you provided has C code examples for Rx & Tx, those could likely be adapted into the IDE as well with not too much effort by a knowledgeable software person.
HopeRF / Hope RF RF12 RF22 RFM22
Interface Arduino to HopeRF RF22, RFM22 and compatible transceivers. Includes classes for node addressed, unreliable and reliable datagrams. Now also supports mesh networks and automatic route discovery. Rock solid, flexible, high speed. Circuit diagrams, documentation and download instructions here.
The www.hoperf.com RFM12/RFM12B/RFM12BP modules for the 433/868/915 MHz frequency bands are connected via SPI. There's a driver for it here.