Nero is one of the more popular retail softwares while never having been used here. It depemds on the type of burning you planning on when deciding which software sees the best results. For data dvds Roxio's Easy Media Creator 8 has worked out while being disabled from autoloading along with Windows. For video projects NeoDVD has been a champ here.
If you are planning to go with Vista sometimes if not already running it you will still want to go with a Vista ready version! Don't get stuck spending $70-$100 for something that won't run later. I was able to get Roxio's Easy Media Creator 8 running here that ran $100 in a retail store at the time. Other softwares despite the compatibility lists seen refused to even install. It's certainly worth going with any software compatible with Vista at this point.
Depends on what you want to do. I really don't like nero for making DVD's, as the DVD menus aren't that great. But for everything else, it's really easy to use and pretty fast.
With the tv tuner card recently installed in december the software package right now is totally "useless" and won't even install on Vista. Nothing even Vista's own new Media Center other then the device manager even detects the card being there. But multi OSing is nothing new here. So for the time being XP still remains the primary.
There are a few freewares to look over while you are deciding however. The freeware Deepburner and BurnOn's free to use and keep version support dvd as well as cd burning. http://www.burnworld.com/software/dvdburning/index.htm is the link for a long list of dvd softwares ro choose from.
Each version of Windows has a limited degree of backward capability. 98 could run some of the 95 programs that were 16bit while 98 was 32bit there. Games often fare better then desktops apps wiritten for one version of Windows and fail to run the next or newer. This is why many will continue running an older version as opposed to simply "tossing away" all the software they spent big money on.
So you saw it as a bundle with a purchase and not a separate item then.
In regards to GripR's earlier question that program would have be tried on a 64bit edition to see it could run there. When changing editions or even versions like going from XP to Vista or 32 to 64nit like seen when going from 16 to 32bit in the 95/98 days expect to see that some or even many programs will fail to run.