Dual-boot, there is no way around it. If you even somehow made Win7 accept the 32-bit drivers, expect it to crash. With 32-bit drivers, it may be accessing places in the ram or processor which isn't there, since this is a low-level thing it would probably just crash the OS.
WOW64 works on software or applications only. Apps work on the higher level, if they wish to call something lower (i.e. direct call to hardware), they'd need drivers to do that.