System parameters (SPRM) are accessed from Scripting Interface. You need to know how to write and use scripts and this is not something newbies like to do, although it is not as complicated as it might seem. DVD SP manual is a good place to start.
Subtitles in Standard Definition DVD are always jaggy. This is because you have only 3 colors to work with. There are ways to make subtitles look nicer, but this requires rendering subtitles as graphics in external application and using Cris Linke Photoshop filter.
Black border around individual letters is usually enough to make them stand out, and at the same time make them unobtrusive. If budget permits, you'd be better off outsouring subtitling job to a reputable service bureau.
For what you need right now a Standard version of DVD AE will do, but you might very soon discover that you'd like to go for a full Mastering edition.
Subbits application
Chris Linke Photoshop plug-inAlex Asp/Solaris Digital Ltd.
