Where has Super Long play gone?

Until recently I was using a demo copy of Nero 7 to burn my DVDs and I could easily get four to five hours on a DVD+R disc (depending on my source material).

I then invested in Nero 7 Premium and ditched the demo disc. When I click on Make Your Own DVD-Video Nero launches Nero Vision 4. Since then Nero only allows to me add video of up to just under four hours. Have I missed something or does the official release seem to NOT support super long play? If someone thinks I've missed an option or a check box or an update then let me know where to look for it 'cos I'm d*mn if I can find it.

At this rate I'll end up wishing I had just held onto and continued to use the demo version!

My thanks to anyone who can help out on this.