Yes, it's ok.
I only use HIMD machines (mz-rh1, mz-rh910, mz-nh700 and 900). In this moment, I'm running Win7 x64 with Sonicstage 4.3 directly, and it's working. I'm using vmware player for Win7 X64 with XP Professional virtual machine too. And when I plug my HIMD minidiscs, they are recognize by XP virtual machines automatically.
Regards.