Unfortunately I only have dual layer DVD's on me right now.
I'll have pick up some single layers sometime today and test tonight hopefully.
Maybe someone else will confirm in the meantime.
EDIT: Never mind. I found a DVD+R laying around. I'm burning right now.
Hopefully this works so I don't have to buy more.
EDIT2: It's working for me. 'Red Light and Speed Cameras' shows up in the menus.
After searching for them, they show up on the map as little camera icons just like the old disc.
Looks like a few of the icons have changed, such as traffic disruptions and such on the freeways. I prefer the older ones.
In short:
rambalu80 disc 2 with cams confirmed working.