Thanks for that, Sam,
I will have a look at it when I'm in the mood for it. Maybe this weekend.
Btw, a student of mine is involved in developing and maintaining the Spanish version of Linux, which is called 'Guadalinex'. I had a look at it on my laptop, and I had the same resolution problem!!
Your job sounds interesting. I saw a great documentary the other week about the Hubble and the James Webb telescope.
Cheers
John