Hi Colin,
There is an excellent little prog. available that you might find does what you want in saving info from the Forum or indeed anywhere else. Check out: (usual disclaimer, I just find it great)
www.faststone.org/FSCapturerDownload.htm.
It isnt freeware but does allow a free trial and then costs c.15 euro for a lifetime licence.
With it you can capture irregular, regular shapes. You can scroll from top to bottom of say a Forum page, then crop the ads.etc on all sides and save to a file or Word doc. You can save further pages to the same doc and so on. It copies videos from yoo-toob etc.also. etc, etc. One last thing about it is that it can grab pics/text even from sites that don't normally allow you to copy them.
The same site has a very useful Photo Resizer for free also.
Hope this helps
John