At installation, Millenium asked you if you wanted to use large block access LBA because your HDD was over 2 Gig and you clicked NO.!
So the result is that you only have 2 Gig to work with. You will have to make a startup disk, boot with it and choose simple boot (the last one down in the options).
Then at the a prompt you will have to type FDISK and when fdisk kicks in delete the logical disk drive and then reformat your HDD.
This time when you reformat, click YES to use LBA and you will have you complete 30 Gig