And if I need to make the change, how do I go about doing that?
For "+R, +RW, +R DL" blank media, change the booktype of the blank media you're using to "dvd-rom", if your burner supports bitsetting changes. This step improves the chances of playability in/compatibility with (standalone, mostly) dvd players. The best way to do this is through the software that came with your burner (if possible).
Otherwise, use Nero cd-dvd speed to do this if you have to: http://www.cdspeed2000.com/
This is a free program. (Click "Extra", then "Bitsetting". Make the change to "dvd-rom" and click "set".)
If Nero cd-dvd speed doesn't work for you (options are greyed out), do this:
a) Download and install imgburn:
This is also a free program
b) Insert your blank media in your burner.
c) Select your burner in the "Destination" drop down box.
d) Click "Tools"-->"Drive"-->"Change Booktype"
e) Choose your burner type
f) Under "Change For:", select what you're using
g) If your current setting is "dvd-rom", leave everything alone and exit Imgburn and ignore step "h)"
h) Under "New setting", select "dvd-rom". Click "Change" and then "Ok". Exit Imgburn
Some drives lose their settings each time you eject, so you might have to do this each and every time before you burn.
You can skip this step if your burner defaults booktype to "dvd-rom" automatically with the various +R types of blank media.