mpeg file encode process (dummy question)

[Rodurigo]

How can I add a board or a permanent subtitle (or anything tha i do on th TMPGEnc process) with a mpg file?
Up to this point i was encoding avi files to transform to mpg and burn into DVD, but now i have a mpeg file that i need to pass through TMPGEnc to add board, subtitle and other things before author and burn... How can i do that? I know that this is a realy newbie question...but i realy don´t know what to do (hehe)

[Rodurigo]

maybe i didn´t make myself clear... What i in fact want is to put a mpeg video through a avisynth script (to burn borders and subtitles in the video) so that later on i can burn it to a DVD media.
How can i do that? Is there another way to put borders in a video than a avysinth script?