This has held me up for years and, sadly, no one has made a walkthrough of any kind! HOW do I figure out the code to get out?!?

This might help:
"First you need to read the original poem. Therefore you have to sort the text-pieces to get  a logical sentence. It's easier, if you write it down, if you're not English (like me). Then you can take the obvious numbers from it in order of appearance (there are four)."