If I understand you correctly, you want to ditch extras and keep main movie and menu? Get TitlesetBlanker and/or VobBlanker. Before apps like that came out, and before I decided I didn't care about menus, I did this:
Rip all files in File Mode (DVDDecrypter). In DVDShrink, open folder and select VTS_xx.IFO of main movie instead of usual VIDEO_TS.IFO manager. Notice extras are not included. Shrink as usual, don't reauthor, backup. Hold on! If you burn it now, it won't play. Start DVDFab 0.17.1 (free) and click "Create Video Manager" (VIDEO_TS.IFO). Select shrunken folder and click continue...VIDEO_TS.IFO is created in folder. (Done in less than a second). Burn it.
I still like that method, as main movie autoplays, but the menu is accessible from your remote. Take an extra step with IfoEdit to make menu autoplay first.