It doesn't offer support officially for Win 7 x64. The link here is to their site:http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=1839197&prodTypeId=321957&prodSeriesId=1839150&swLang=8&swEnvOID=1093#113165
I would try and install Windows, then see what or if there are components it didn't install. Then go to above list, get what kind of device it is (ie sound driver) and do a google search for them. Windows 7 will probably have most drivers.
Another thing, make sure the CPU is an x64 CPU. Otherwise you'll need 32 bit Windows.http://ark.intel.com