Testdrive with VirtualBox and ISO kernel built with PAE

If you choice of Virtualization is Virtualbox and the ISO your testdriving is using a kernel which was built with PAE support then the ISO does start and throws an error on the guest console:
The message in the virtualbox console is below:
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This kernel requires the following features not present on the cpu:
pae

Unable to boot - please use a kernel appropriate for your CPU.
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there is a work around which is to manually start VirtualBox which at this point the testdrive image configs should have been written already to disk. Go in to the Image settings->system->processor and select PAE Support.

But it would be nice if the config that testdrive was using for the image already new that it should have the PAE support enabled