how to change bios language from german to english in windows 7 enterprise

Hello all,
I bought Lenovo Ideapad Z560 with windows 7 (german) enterprise 64 bit OS...
I could change the display language settings from German to English by installing the language pack...
While the notebook is booting...till the login page it is displaying information in German...how to change the language?...I get into the BIOS settings,...but I could not find any options for changing the language...
I would appreciate..if any body could help me out...
good day

Well, until Lenovo customized the BIOS settings, you may find language options inside BIOS. If you cant find it there, I am afraid you may need to flash your BIOS with a English language firmware update.

But its very risky even if you can find the exact flash update for your BIOS.

So I will advise, don't go for something like flashing it unless its too much of problem for you.