Adding subtitles to DVD

[PiosOne]

I want make DVD copy of DVD-U2_Live at Boston which haven't any subtitles. I make new VOBs with reencoded video and my own subtitles. Everything works (audio changes, chapters, menu). But I can't switch subtitles (in PowerDVD subtitles are grey). I'm trying edit IFOs but it don't works. Can anybody help me?

[malimarek]

In this Ifo files (PGCITI) there is this color matrix with 15 colors which you need to fill, make sure you find the right one. The guy who made IfoEdit (God bless him) put some extensive explanation how to do it but I always have a basic issue with the subs color if I create Ifos from a scratch - I never have the color I would like to have. The idea would be to see what color table has the original DVD Ifo and just retype it to your newly created Ifo. There may be a much easier way to do this as I found my self managing to do things extremely hard way but somehow it works though. Good luck. Marek

[PiosOne]

I don't mean that subtitles haves grey colour but that there aren't subtitles and subtitles menu on right button is greyed. And subtitles aren't available.