While you're at it look into CloneDVD from elby (former owners of CloneCD). You can D/L the 30-day trial and find a key for it out there. It keeps all the menus intact and you can use it to strip unwanted titles, languages, subtitles, previews, etc. The latest release shows a quality meter and fixed a bug where the dropped titles were dummied gray-screen images and truly drops the title from the ifo now. Total re-encrytion time for a full DVD is about 38 minutes on a 2GHz system.
This thing is completely self-contained, except it won't RPC-free, demacro, or decss (use DVDDecrypter to rip it to HD first). It will burn directly to DVD, create an ISO image on your hard drive, or you can put the Video_TS on your drive to preview it before burning, then do a direct burn to DVD when you are satisfied with the results. I often put it directly on RW to test it in my players around the house first--it will quick erase a used RW before burning to it.
Even at the retail $49 for the key, it's a gem of a deal compared to $99 retail for Xcopy.
If it ain't broke don't try to fix it! But, hell if you can tweak that bastard just a little bit more....hehehe.