How to revise the position of the subtitle in avisynth

[andilan]

hi,i m a newbie,have a quetion now,Hope get help with everybody

i make a script for avisynth,I want to place the subtitle in black blank,but i don't know how do it,sorry,my english is too bad

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black blank (I want to subtitle in here)
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VIDEO

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black blank (I want to subtitle in here)
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my scripts:

LoadPlugin("VSFilter.dll")
DirectShowSource("E:\dvd\CD1.avi",24)
VobSub("E:\dvd\CD1.idx")

[mf]

AddBorders (http://www.avisynth.org/?page=AddBorders).

[aklendathu]

If I understood the question correctly, you want TWO different subtitles overlaid onto your video, one above, one below ?