Run Mountain Lion installer under Mavericks to install ML on a second partition

[durner]

Hi,

I've upgraded to Mavericks (Developer Preview) and would now like to set up a second partition with Mountain Lion. I've got the installer from the AppStore and created the partition using Disk Utility. However, when I try to start the installer it prompts me that "OS X 10.8 can't be installed on this computer".
Any ideas how to get it to install on the second partition?

Thanks in advance

 

[w0lf]

Make a USB installer https://www.macupdate.com/app/mac/39701/lion-diskmaker