What version of
DvdReMake Pro are you using?
To merge the flipper disc and play continuously and seamlessly:
1. Copy the movie PGC from disc 2 and append it to the movie PGC in disc 1.
2. Change the Seamless flag to "Yes" for the last cell of disc 1 movie and the first cell of disc 2 movie. If the last cell of disc 1 movie is a blank cell, you can safely delete it. If there's a chapter reference to it, delete it as well.
3. Create chapters for the appended disc 2 PGC.
If you don't care about menus, then this will do the trick. If you'd like to import disc 2 chapter menus, you need to adjust and add the appropriate commands to refer to the appended disc 2 PGC.