In 2011 Quietust made a really handy iNES header editor for Windows. I actually use it all the time. After discovering a minor bug in it yesterday, I noticed its source code was available and gave it a slight update.
Changes:
Original version here: https://www.qmtpro.com/~nes/tools/nes2edit.zip
Attachment:
Changes:
- Fixed bug that failed to update iNES header version radio button on load.
- Support for opening a ROM via command line.
- Switched from "multi byte" to "unicode".
- vcproj/sln converted to VS2008.
Original version here: https://www.qmtpro.com/~nes/tools/nes2edit.zip