using a pc keyboard and vo dure in os install

[ben mustill-rose]

Hey all.
Sorry for starting another topic with a stupidly long subject line,
but I think its better if things are done this way for archival
purposes.

Since i'm at school and my other mac is at home, all I have is pc
hardware here. I was wondering if anyone is able to tell me how I
would go about pressing command and option on a bog standard usb pc
keyboard?
Secondly, when I got my first mac and installed tiger, I didn't kno
about how vo could be lornched to do the install with out help, so
i've never done it on my own.
I can work out what options I need to tick and things like that, but
after booting from the disk and waiting for it to quiet down, am I
able to just press command f5 and have it start speaking?

Thanks for any answers to any of the questions.
Cheers.