Sonic's eDVD product will do what you want as far as the url goes.
There is some documentation on scripting with the 4.0 docs, but it is very limited. My suggestion would be to visit www.dvd-replica.com and take a look at the information available with possible consideration toward purchasing the "Unofficial DVD Specifications" (which is much less expensive the purchasing the official specifications.
They sure don't seem to call that to attention. I've only found a single screen shot on their web site that suggests they rolled in the eDVD functionality.
My copy of eDVD 2.0 decided to stop working - my luck it probably phoned home and got deactivated; as I downloaded the install kit, I doubt I'll be able to do the re-install like the app is asking.
I guess I'll snag the trial copy of DVDit pro and see if it will allow projects built by other authoring apps to be enhanced. At $400 it's still cheaper than the original copy of eDVD that I purchased. Sill a little irritating though.