Hi Arent,
first MAKE MULTIPLE BACKUPS AND PUT THEM IN MULTIPLE LOCATIONS.
this will allow you to experiment and still have your original wallet data.
Do you have any programming exp? That will really help.
you need to load Python on a pc and there will be a few other Python addons. I'm short on time but will try to get you some instructions on Monday. Like I said in a previous post, getting Pythong and Pywallet set up is the hardest thing to do. after that you just use the pywallet UI to strip out all the transactions so the wallet will open. once the wallet is open you use the command window to pull the private key. then you start a new wallet and again using the command window copy the old privkey into the new wallet and your coins will show up.
More info to follow.