Hi all, I have just completed my article about how to Porting FreeRTOS to AT91SAM7S256 board. At link:
Maybe it has some things not correct, so, if you can, please review and comment it. This help us having good and free tutorials.
Also, you can read here for getting basic IAR: http://letrungthang.blogspot.com/2009/11/arm.html
Note: supplied source code was tested and run OK.