Thanks for all the encouragement there guys.
If you haven't used it yet, get a copy of Autostitch (
www.autostitch.com), it's free and pretty easy to use. Simply take the shots with some overlap (I usually use a third of the previous frame in the next frame), convert all the shots to jpeg (Autostitch only uses jpeg), put them in a separate folder and point the software at it. You can adjust the setting after you see that it's combining the images correctly.
Cheers
Stuart