How do I hardcode multi-line subtitles from an .smi

[LNSVideo]

I'm using another software that generates my .smi files, supposedly with the capability to display up to three lines of subtitles, though i cannot figure out how to make that show through while I'm using the "Stream" option to hardcode the video. Are there settings in Tools that will allow them to scroll, or does anyone have any suggestions about the best possible solution?

Thank you in advance for your two, or three cents.