@nycdesigner:
You've confused a few things. A "dump" is just that, a byte-for-byte download of the original Canon firmware.
If you have an SD30, you already have the firmware on board and the "dump" is of no use to you whatsoever -unless you want to disassemble it to find the routines to begin the port to CHDK.
After porting, and compiling, etc., the "two requisite files" you refer to, DISKBOOT.BIN & PS.FIR, are created and those are what load CHDK onto the camera.
HTH,