[nrfitchett4]

why would you flash an australian radio to sprint???
Pull the battery, wait about 30min. put the battery back in, and try to turn it on while pressing the vol. down. If you can get back to a working bootloader, you can reflash to the CORRECT radio.
If not, your only other choice is to try and install a proper radio from the memory card. Apparently, this is a faster choice and sometimes if you can get it started, it will finish and not error out.
To do this, you need to find a copy of bootloader.exe (look in the stickies section of the cdma custom ROM section for the thread on flashing from the sd card).
put that bootloader.exe on the root of the storage card (aka not any folders). You will have to use a card reader to do this. Then transfer a SPRINT RADIO, found in the stock radio section, to your card. rename it RHODIMG.NBH.
Put the card back into the phone, pull the battery for a bit, put the battery back in and power on the device while holding the vol. down button.

If neither of these methods work, you probably bricked the phone and it will never work. On the bright side, if you have the TEP insurance, you can just run your phone over and get a new one for 100.00