Partition Help - Breezy and XP on HP laptop

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I would like to install Breezy as dual boot w/XP on an HP zv6270us laptop.
This is a single 100GB drive, formatted NTFS with XP installed.
a couple of questions:

Some how-tos install grub to the mbr, others say this is a bad idea, and it
should be installed on
the Linux partition. Any comments here?

I have read that my swap partition should be 2X the size of my ram. This
would be a 2Gig partition.
Does this sound right?

I would like to put my /home directory on a separate partition. If I name it
/home when it is
partitioned, will Ubuntu know what it is for, or will I need to change a
config file so Ubuntu will
use it properly?

If this was your 100GB drive, how would you divide it for this setup?

Also, if you have installed Ubuntu on an HP zv6000us series laptop, any
insights are welcome.

Thanks for a GREAT list.

Bradley