Downgrade DELL R620 to Windows Server 2003

Hello,

We just bought a Dell PowerEdge R620 server. And we need to "downgrade to Windows Server 2003.

After researching on your own website, I found that was possible, but we need the PERC driver. We have a PERC H710 controller.

Please find all the information in the link below.
http://en.community.dell.com/techcenter/extras/w/wiki/3846.how-to-install-windows-2003-on-dell-12th-generation-poweredge-servers.aspx

I tried to call my personal DELL sale manager and the DELL technical support without any helps.

thank you

Mathieu