To make it easy, first install your SSD and left HDD untouched - literally.
- Boot up from install disk, do partition on your SSD (i suggest to have only a partition for SSD) and install windows as usual.
- Configure what you need to do with your windows (users, install essential software, etc)
- Turn off your computer and safely install your HDD in place
- Turn on PC, go to BIOS and lift up your SSD to 1st boot priority (optional, just a super bit faster)
- Go to Disk Management, for win8 you can look up here
http://pcsupport.about.com/od/windows-8/a/disk-management-windows-8.htm
- Make partitions for your 500gigs HDD and there you go...
Now you can place whatever you like in your HDD and SSD, make sure you don't mixed up their...