800xA 5.1 RevA FP1 32/64 bit Installation coexistance

Hello,
a 800xA 5.1 RevA is running on 2008 32 Bits servers with Windows7 32 Bit clientes connencted.
Now we have to installal a new client, we have a HP Z2 G3 Mini who it doesn't support Windows 7 32 Bit so we have to use Windows 7 64 Bit.
Based on 5.1 Rev A requierements it support Windows 7 32/64 bits OS but is not clear if it can live in the same system.
¿In this version, can 32 and 64 bits SO coexists?
¿Can I use 800xA 32bit (in the box isn't specified which version is) installation media on a Windows 7 64 Bit SO?
Regards.