Multiboot Linux question

Hi all,

Recently I'm stucked with multiboot.

I have a disk with following partition:

sd1. 157GB NTFS of Win8
sd2. 55GB including:

sd5. 500M /boot
sd6. 4GB /swap
sd7. 50GB BTRFS Fedora 18

sd3. 55GB not parted
sd4. 32GB not parted

Now I want to install Fedora 17 on sd3 or sd4, but I don't know howto. From Anaconda I failed evrrytime for not enough space or some other reasons.

So any hints availabe? I think two lvm is the way of installing dual Fedora, isn't it?

Thanks everyone in advance!