There's a free app you can download that converts formats, including .mov, into your choice of several other formats.
Video DVD Maker
As for your question, can you use Nero 7 Ultra...I don't know. I have Nero 6.5 Ultra, and I tried playing around with its Nero Vision Express, but I didn't get very far with it.
For my own conversions I use WinAVI Converter, but that isn't free. The Video DVD looks like a free approximation of WinAVI.