Windows 7/8 32-bit with Multiboots
1) Shrink volume http://windows.microsoft.com/en-us/windows7/can-i-repartition-my-hard-disk
2) Right click on the new unallocated space and click New Simple Volume.
We recommend ordering the DVD's rather than the download.
When installing, boot from the DVD, when asked use custom install and select the new empty volume.
This would typically be Windows 8 (64-bit) in volume 1 and Windows 8 (32-bit) in volume 2.