through unofficial Japanese support team (you'd better use Google translate
(the updates make Windows2000 run latest software, e.g. intended for w7+, such as CyberFox, revealing thus the "incompatibilty obstacles" are blatantly intruduced by M$ as purely artificial marketing wise like)
which apperas to be still supported
and
even they offer their unofficial WindowsUpdate service
You can download VMware w2000pro installed image, which is nice to apply the Japanese unofficial updates, but apparently there is no such for VirtualBox, so conversion is needed.
Just moved/converted VMware virtual machine image with w2000pro,
through VMware's ovftool
and (afterwards) VirtualBox'es:
File->Import Appliance...
menu option,
like e.g. following these steps
The both sages of conversion went well, without any warning nor compliants,
however, the resulting system can't boot, the message of no operating system putted out.
As to remedy it, putted Rescatoux CD and have chosen Windows MBR repair.
Now the booting sticks on blank dark screen.
However, to make boot anyway, have used Hiren's Boot-CD, and in it's menu have hitted the first option:
"Boot from Hard drive (Windows Vista/7/2008 or Xp)"
and the system booted at last!
However without the support of keyboard and mouse so it is impossible to do anything, especially unistal VMware-tools and install VirtualBox's Guest Additions.
What to do?