Alas - and no shooting the messenger - no Windows 10 support is offered for systems this old. Intel provides Windows 10 support for systems that utilize 3rd Generation or newer Intel Core processors and 7 Series or newer Intel chipsets.
All that said, the default drivers provided via Windows Update will typically suffice for systems that are this old. Have you tried installing Windows 10 already? If so, have you seen any unresolved devices or anomalous operation?