How to access Windows Registry from DOS?

I need to access registry from DOS, while I boot from DOS bootable disk.
I've searched all the internet, and found only Offline NT Password and Registry Editor, which can not be used in DOS, as I understand.
Also I've found RegView (from many mirrors), which isn't working too (I've tried many instructions).

Is there any easy-in-usage tool, like reg.exe, which is able to load registry hives,
so that I can change registry values?? Or any working instructions ??

Note: I already have a bootable drive, which can read/write to NTFS drives.

Thanks in advance!