Bios Mods -The Best BIOS Update and Modification Source

Hello. Sorry if my question is absurd. I have a SiS W76Sun motherboard. I was updating my bios and i tried to install different rom from different motherboard manufacterer. Phlash give me a option like "This roms manufacterer is different. Continue? (Y/N)" I get in risk and i pressed "y" It erased data, programmed data and than verify it too long. Then when verify finished it started from program and again. I shutted my computer and crossed my fingers then started the computer and it opened with old bios. I thanked god for that. So if there is a way to install a bios from a different motherboards rom what are the risks and how can i try that? Thank you and sorry for my bad english.