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Hi Peter,
Next thing to do is to get a nice bright star on the main CCD, Sirius will do, or Canopus.
Now using focus mode on the main CCD, push the star to the top centre of the CCD, noting the direction you have to move the mount in order to do this. It will be easier if this movement is solely in one axis, either RA or DEC.
Now switch to the guider CCD and put it in focus mode with very short exposures, <1s should be fine for either of the stars mentioned. Now, slowly move the mount to keep pushing the star in the previous direction, i.e. push it off the main CCD, before too long you should see the star in the guider CCD.
Most likely you will see a star that is wildly out of focus on the guider CCD, focus using the focus knob on the FW-8G.
The added advantage of this is that you get a feel for how far from the main CCD image your guider FOV is.
If you do not see a star then the guider CCD may be faulty, mount it in the back of the main scope (like for planetary imaging) and aim at something bright, one of the aforementioned stars would be good. Make sure that you are getting an image.
Be careful with focal reducers, they can distort the stars that are at the edge of field quite a lot.
HTH.
Cheers
Stuart
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