Newbie question... (mercy)

[portcontrol7]

Hi all,

I'm installing BT5 64-bit KDE version in VMWare Fusion on a Macbook Pro. Here is that basic setup:

30GB HD space split into:
2GB swap space
28GB /
2048 MB RAM allocated
2 Processor Cores (of 8)

It's installing now, and I noted that after setting up the filesystem:

dev/sda1 /
dev/sda5 swap space

Newbie question: Wheres sda2-4? Seriously, I don't understand this.