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Stefan,
you'll find a few guides here on collimation of an SCT I am sure.
You will only need a set of allen keys to adjust the corrector screws at the front (not the one in the centre) and a reasonably bright star. Defocus until you can see a couple of diffraction rings and then adjust one screw at a time, by loosening one a little and then tightening another. If you go the wrong direction reverse the procedure. You only need to loosened a quarter of a turn each time.
If you are not sure, get someone from your local area who can collimate an SCT to show you how it is done. Once you learn you will never look back. This is just part of service of equipment you own.
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