No, MPEG files don't have any place to hold chapter and menu info. That usually goes into the project or .ifo/.bup files. Nero wouldn't know what to do with the project info. It has it's own templates and extra features. You'd have to recreate the chapters and menus with Nero's NeroVision Express and then let it create the .vob, .ifo and .bup files.
If your Pinnacle will make an 'image' copy of all the project's DVD files (.vob, .ifo and .bup suffixes) on your hard drive instead of trying to burn it, that gives you a chance to test everything. PowerDVD and Nero's Showtime will play from a hard drive source. Then if it works ok, you can use Nero to burn the files to the DVD. Make sure the file system is set to UDF V 1.02 and not Joliet or ISO9660.
Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."
System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70