Hi - I have a question or two about partioning (sorry Im new with this Linux stuff I've burned a cd with Ubuntu live and want to partion my 1GB mmc.

1.)When I reboot into linux how can i access parted?
2.) When I execute /dev/sda does this just partion the 770 drive (i havent run parted yet so maybe this is self-explanitory - i just dont want to format my c drive
3.)How do i specify the size of the partions? I'd like to have 800mb fat for movies and 200mb for linux.
4.)Does the sudo mkfs.ext3 /dev/sda2 command format just the linux partion? Is this all i need to enter?

THANKS for your help - Im just a little confused by the linux stuff.