Some steps for you:
- Loosen the three secondary screws enough to allow the secondary to pivot on the central bolt.
Turn it till the image of the secondary seen through the focuser is circular.
This circular image should be centred in the focuser by adjusting the central bolt up or down till it has an even margin all the way around the secondary. It may help to put some paper in the tube between the secondary and primary to stop the image of the primary confusing you at this step.
Adjust the three secondary screws till you can see the primary centred, if you use your laser it should hit the primary right in the middle.
Check the shape of the secondary image again and adjust if necessary. This will mean adjusting the secondary tilt.
Repeat this till the image of the secondary is centred in the focuser (this is where a Cheshire eyepiece is really handy), the image is round and the beam of your laser hits the primary in the centre.
Adjust the primary to get the return beam from the laser to retrace itself back to the laser hole.
It takes practice and time. This is not the "best" way to collimate but it is a definite step up from the hole in the film canister trick.
Cheers