Hp, Windows Server 2003 support matrix

HP Windows Server Operating System Support Matrix
http://h71028.www7.hp.com/enterprise/cache/461942-0-0-0-121.html

Microsoft Windows Server 2003 matrix
http://www.microsoft.com/technet/windowsserver/evaluate/features/compare.mspx

Switches to enable more memory for Windows
boot.ini
/3GB /PAE
http://www.microsoft.com/whdc/system/platform/server/pae/default.mspx
http://www.microsoft.com/whdc/system/platform/server/PAE/pae_os.mspx
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx