Qosmio F50-10Z Bios update crashed - how do I reset cmos?

I have a Qosmio F50-10Z and as prompted by toshiba I downloaded the Bios update and began to install.
My screensaver came on and the whole thing crashed.
Would not turn off (even after holding down power button for 15 secs).
Took battery out and then put it back in. Computer powers on but screen is blank and won't boot up.
Tried to take it apart to flash the bios by taking out rtc/cmos battery (whatever it's called) but can't find the battery and got to the point where I wasn't willing to take it apart any further (has no-one else ever taken one apart?
Couldn't find information or diagram or photo of where the battery was on net...manual for laptop really unhelpful)
Have found comments about crisis disks but I don't know what this means.
So, how to I reset bios?
Please help - you are my only hope.

Thanks for your comments. Do you know where I can download a Bios flasher or Bios recovery crisis disk from? There seem to be a lot floating around forums but I cannot find anything specifically for my laptop. Am I missing something on the Toshiba website? I have seen people mention downloading a bios flash utility from toshiba (specifically for the F45) but can't figure out where they are getting this from...
In response to your recommendation - I know that is what I am encouraged to do but I'm in the UK - my nearest Toshiba recommended technicians are PC world conglomerate - the sort of guys who pat me on the head when I ask for specific RAM (rather than 'some memory, please'), look blankly at you when you say the word Bios, and bang their mouse when the computer freezes! Besides, they want 50 up front whether or not they manage to fix it, and given how many of my friends computers they have failed to fix that my boyfriend then fixed in ten minutes, I might as well burn my money as send it to them.

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