/* burn image with another, 3rd party, application – i’ve got Nero 6 (would that work? Or does it have to be IMGBurn?) */
https://www.imgburn.com/
ImgBurn is software for recording any types DVD-Video to disks (dvd5/9, image or VIDEO_TS folder)
Nero6 CAN NOT write images RIGHT….. so…
/* Not sure what you mean by ‘book-type’? */
book-type “tells” to dvd-player what kind of disk is inserted – DVD-R, DVD+R, DVD-ROM, DVD+R DL, DVD-R DL.
No all players can play +R or -R disks, but all can play DVD-ROM (by book-type, not by media)
+R and +R DL disks can be written with setting DVD-ROM and be playabe on all players (my last test – OOOLD LG player can play +R DL disk).
and, ImgBurn is free!