Learn German: Solange ich das Skript lese, darfst du mich nicht stören. - As long as I am reading the lecture notes, you must not disturb me.

You would turn the verb into a present participle with zu and use it as an adjective before the noun. For das Skript, it becomes das zu lesende Skript. This translates literally to 'the to-be-read lecture notes', expressing a passive obligation.

Why does the translation use 'must not' when the German sentence uses dürfen (to be allowed to)?

In German, nicht müssen means 'not have to' (a lack of obligation). To express a strict prohibition like 'must not', you always use nicht dürfen (not be allowed to). So du darfst mich nicht stören correctly translates to 'you must not disturb me'.

Is Skript a false friend in this sentence?

It can be! While das Skript can mean a script for a play or movie, in the context of studying and German universities, it almost always refers to the professor's 'lecture notes' or the provided course packet.

Why does darfst come right after the comma instead of a pronoun?

Solange (as long as) is a subordinating conjunction, which kicks the verb lese to the end of the first clause. Because that entire first clause takes up the 'first position' of the overall sentence, the conjugated verb of the main clause (darfst) must come immediately after the comma in the second position.