hello, illan, and welcome to CDRLabs (a fellow Israeli ?)
check out this FAQ:
Bitsetting / Booktype
basically booktype is just a bit of info somewhere on the DVD. saying what kind of disc it is. a DVD+R should be DVD+R but a booktype utility can change it to DVD-ROM (lying, if you like).
you need a drive/firmware capable of doing this. not all drives can.
this is for DVD+R/W only (not DVD-R)
you can use Nero to find out what firmware the drive has in it now. click the Choose a Recorder button (or Control-R).
or Nero InfoTool from the Nero Toolkit in the Start -> Programs -> Nero.
you can usually download firmware for drives from manufacturer's websites. on some drives you can actually back up the firmware that is in your own drive. i think Lite-On/Sony drives can do this (= there are utilities for these drives that can do this).
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien