Just why would you even put another OS on the same partition of another OS... >_>
It doesn't matter,
I already reformatted.
200GB's on my Windows 7 Partition,
70GB's in a seperate storage partition (In case I ever have to re-install win7 or ubuntu, I can just store shit in here).
50GB extended partition for Ubuntu
> 256MB /boot
> 10GB /
> 2GB Swap
> Rest for /home
So yeah, that's working out pretty well for me.