Sorry if I overwhelm you with tons of info. I don't know how knowledgeable you are in the video world. Some has a few learning curve, I guess you may need an extra boost.
If I may, let me clarify a few things, hopefully to ease your frustration which I completely understand.
1.
DvdReMake Pro is a DVD editor. It does not gear toward menu creation, which authoring software is designed to do, among other things. Hopefully, the author may expand this area in future release if there are enough users express enough interests for the author to plan and implement. What DVDRMP can do is replace menus created by an authoring software. At the moment, the menu must be in VOB format for DVDRMP to replace. Request has been made for it to accept BMP file (just the menu background, not the subpicture bitmap) in the near future.
2. The testimonial you quote is true depending on what actions are done. e.g. if all you do is blank the previews, warnings, logo, or any simple editing, you can accomplish it in a few minutes with the assumption that you're already familiar with the program. However, dealing with menus and replacements do take time, but not that long. The only time consuming part is modifying/creating the menu background, etc.
3. DVDRMP is very customizable that you can make editing tasks as simple to complicated as you want.
4. DVDRMP does not have a burning engine, so it cannot burn DVD. Nowhere on the website does it say that. You can browse through the menus and toolbar and see there's no option to burn as well.
With these said, the packages I mentioned are authoring tools with menu creation capability with button pointing to a specific chapter. The author of each package is able to help you should you give it a try.
Since you're continuing with this project, perhaps I can help you walk through this if I have your files. Include in the zip file all the original IFOs, the menu VOB (VIDEO_TS.VOB) and the new menu background (BMP). Then upload to file hosting site like savefile.com.
Remember to save the bitmap as 24-bit bitmap in PaintShopPro. As I mentioned in #1 above, DVDRMP only accepts VOB file for replacement, not BMP. But no worries, there's a nifty utility that automatically converts BMP to VOB format:
http://www.cdr-zone.com/forum/about6965.html Just follow the directions.
You mentioned that there are 16 buttons. Is this created by the DVD Recorder or you add this in PaintShopPro? If 16 buttons are created by DVD Recorder, then Replace with still is the one to use unless you change button positions. If they are created in PaintShopPro, then use "Replace block", available in the Programs pane. Well, I will know this once I receive your files.