[xgm541]

Basically, stock ROM's usually include radio's with them

the one you are reffering to does not

in other words, if you flash the stock rom, you wont get the stock radio back, assuming you flashed another radio.

so lets say the stock radio is 1.1.1 (example), and you flashed 1.1.2, if you flash a stock ROM, it will flash the radio back to 1.1.1, and if you use the rom only, it will leave the radio alone

hope i explained it.