Tiny OS

Hi everyone!
I hava a PIC18F2520 Interface Board with X-Bee wireless option:
**broken link removed**
I want to write tiny OS and upload it to the board above. Is it possible? If yes, how must I do?

Thanks !

The link you posted above is not complete.
I would suggest you possibly have to "burn" (program) the chip just like you program any other PIC chip via a programmer and if the OS you have burnt into the chip allows the chip to receive an updated program, the chip can be updated "remotely."

This is the link PIC18F2520 Interface Board with XBee Option
I want to use this board and its wireless option X-bee as a sensor node in wireless sensor network. Using Tiny OS which is an OS for embeded systems has a lot of advangtages as power consumption, flexibility... So, I want to buid it.