How to create dual-content DVD

All the DVD-player-accessible stuff is going to end up transcoded into VOB files and stuffed somewhere inside /VIDEO_TS. As far as I know, DVD players will ignore stuff that's not contained inside /VIDEO_TS, /AUDIO_TS or /JACKET_P; so if you create another top-level folder, and put an easy-to-navigate folder structure full of JPEGs inside that, it should all Just Work. You will of course end up with two copies of every picture (one JPEG, and one included inside some VOB somewhere) but that's the price of compatibility.

++flabdablet. There is nothing magic about DVD video discs. Players just look for that VIDEO_TS directory and read that, ignoring all else.

I should add that when I do this, I typical tell my DVD authoring software to write to disk files (and not to burn an actual DVD). Then I use Nero to create the directory structure I want and dump the extra files on the disc. Lastly, Nero burns my DVD. If you do not have the option of writing to disc, not to worry! You can copy the VIDEO_TS directory to your hard drive then use Nero (or whatever burner software you have) to do as above.

Yeah - this is how special edition DVDs with ROM content are created; technically they're called hybrid discs. I've no idea your Sony software works, but if it doesn't have an option to create a hybrid disc, then just create your regular disc for the player first - which'll result in Audio_TS and Video_TS folders - and then just burn that information as a Data DVD putting - as flabdablet says - the Audio_TS, Video_TS and your pictures' root folder at the top level. You could use a free app like Deepburner to do this if your software won't. Bear in mind that a lot of computers autorun DVDs, so when you put your finished disc in the ROM drive you'll probably have to close out of the default player before you can navigate to the photos.

flabdablet's pretty much got it, but you will need to burn it as a DVD-Video, not a DVD-ROM, in order to have the correct block sizes and filesystem (UDF 1.02, IIRC) for it to play on a normal DVD player (yeah, some will play anything including DVDs burnt as DVD-ROM, but it's not spec and therefore not guaranteed). Note: I'm not talking about the booktype there, but the actual filesystem structure. Booktype is a different thing altogether. My version of Nero (6.something) won't do allow you to do this, I don't think. I believe VSO's CopyToDVD will, but I'm not sure. I know the burning engine in Mediachance's DVD-Lab does, and I'd expect whatever burning tools come with DVD Architect would too. Or you could figure something out with some of the usual ISO tools by creating the DVD-Video ISO in DVD Architect, mounting it and adding your files, then burning the resultant ISO.