I have Problem whit new install

Hi people

I have a Dell Poweredge 2700 whit RHEL 6.2 ok

But my client need other version to RHEL 4 ok

Well i download the RHEL 4.8 .iso to my server, 

Then i make a DVD whit the .iso to i download.

I try to intall whit boot in CD / DVD 

But the DVD dont open nothing, and i need to install the RHEL 4.8 

How can i do a install in my server 

I try to do in VirtualBox whit the RHEL .iso but dont past the test.

Please Help me