Just to keep your options open here are some other shortcuts you might also like to consider.
First and foremost, if you’re looking for a quick user friendly fix, Menushrink is a great piece of software and I’d highly recommend it.
It converts menus to user selectable stills and you can also choose whether to strip or retain the audio.
All of which is very easy to accomplish with this software and it works exceptionally well.
If you’re a bit more technically minded most end credits are contained in separate cells on the DVD and PgcEdit can remove whatever cells you require.
You can also use PgcEdit to remove unwanted content (intros, outros, trailers, warnings, specific extras etc.) by killing playback of unwanted PGCs.
Quite often PgcEdit’s Jump2PGC function when used to jump directly to the main menu will make a lot of material uncalled and it’s cleanup functions can automatically remove this material.
You can of course combine all of these techniques if you’re really tight for space.