Collimating a Mewlon 250

I have recently acquired this OTA and have noted non-concentric reflections of the main mirror when a very bright star is in the CCD image.

I need a careful walk through of the procedure as I don't have any Tak procedures to work from.

Thanks!

Go to the following site for a complete explanation of how to collimate your scope. It features a little FLASH application that let's you practice before you actually adjust your scope...it's really cool.

Below is a link to the European Tak distributor website filterd by Alta Vista's Babelfish translation service so you can understand the text.

http://babelfish.altavista.com/babelfish/urltrurl?lp=fr_en&url=http%3A%2F%2Fwww.optique-unterlinden.com%2Fpratique%2Fcollimat.htm