To capture video with Nero 6:
Start 'Nero StartSmart'
Select 'DVD'
Select 'Photo and Video'
Select 'Capture Video'
Although this will work the features are very basic and once captured I don't think there are any options for editing.
Also Nero 6 does not have full DVD authoring features. You can create a DVD, but I don't think you can add a menu or chapters. Yoiu need the latest version of Nero for that - Nero Reloaded!
IMO you will be better useing Windows Movie Maker 2 (free as part of Windows XP) to capture & edit the video. To learn MM2 have a look at
www.papajohn.org
Once you have all the edits done then you can use Nero to copy it to a DVD (but without menu & chapters!) or buy a dedicated authoring program such as Ulead DVD Movie Factory 3 (this is what I use!). It costs between £25 & £30 online and is very easy to use and will offer a lot more features than Nero.
Mark.