The B & B DVD and I Jones DVD are in different situation. The menus for the B & B DVD are in different VTS than the movie, whereas the menus in the I Jones DVD are in the same VTS as the movie. Below are the steps for the I Jones. To explain the reasoning behind these steps is time consuming. It's easy to do it than to explain. But you can actually use the debugger to run step by step and see how the navigation flows. It's best that you reorganize the Registers and System Registers panes around so you can see everything at once. I put these 2 panes at the bottom of the window.

1. In VMG PGC 1 (Title menu), insert pre-command R[4]=0 at line 1.
2. In VTS6/Menu PGC1, insert pre-command "if (R[4] == 1) Link PGC 6" between lines 3 & 4.
3. Delete all pre-commands in menu PGC 6.
4. Copy ALL the pre-commands in menu PGC 6 from the attachment (project 2) and 'Add copied' in the same place in your project. I don't want to type all these commands in here - it's too long. Wish there is a Copy to clipboard in DvdReMake. It will save a lot of time.
5. In menu PGC 10, insert pre-command R[4]=1 at line 1.
6. In menu PGC 15, insert pre-command R[4]=0 at line 1.
7. In menu PGC 18, insert pre-command R[4]=1 at line 1.
8. In VTS6/Program chains/PGC1, add pre-command R[4]=1 at the end AND insert post-command R[4]=0 at line 1.

You should see all these additions and insertions in the attachment.

That's it. Hope this works out for you.