*.r4script

How I can set SIZE, VPOS and TIME in *.r4script files?:
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set([txt],[This is a test]);
set([sc],find([file],[announcenormal]));
for([x],[0],strlen(txt),[settweak(sc,x,strchar(txt,x))]);
addoverlay(sc);[ok]
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set([txt],[This is a test]);
set([sc],find([file],[announcenormal]));
for([x],[0],strlen(txt),[settweak(sc,x,strchar(txt,x))]);
addoverlay(sc);[ok]
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