Today I was installing RHEL6.2 i386 as a virtual machine. As soon I started up I faced an error message like:
This kernel requires the following features not present: pae Unable to boot - please use a kernel appropriate for your CPU
If you get this error enable PAE/NX on your virtual machine by navigating to:
Settings->System->Processor->Extended Features and tick: PAE/NX
After that my problem is resolved and able to install OS.