So the obvious fix was to copy the .cvspass file from cygwin to whereever CVSNT kept its cvspass file. Well, it isn't that easy, since CVSNT keeps such passwords in the Windows registry. But since I had no previous logins with CVSNT, I didn't knew what to put in the registry.
I found really easily that the key is under HKEY_CURRENT_USER\Software\cvsnt\cvspass, but how do I save it? Looking at the line in my cygwin .cvspass I saw the line had the format:
/1 :pserver:firstname.lastname@example.org:/u S()meh4s'h00
I finally found out that I have to create a string value with the name ":pserver:email@example.com:/u" and the value data that hash "S()meh4s'h00" and plainly ignore the first field.
Stay tuned. The next article will be about what's common between Windows 7 and GNOME 3 / gnome-shell, since I upgraded my home laptop to wheezy (I really wanted to use pitivi 0.15), and my desktop at work to Windows 7.