basicly

$result=`cat $PROG >> $TEXTFILE`;
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(use type instead of cat> on windows)

will do the same if I understand what you're trying to do, just add a some error checking.

TIMTOWTDI !!!

But to answer your question, I see nothing wrong with your code (except that you're not lazy enough... ;-)

may be some spelling errors (but as a french guy I won't go on this !)
I would suggest, as a general rule, to use variable for numerical constants (the 75) if they're used more than once