Note that I've had the redirects in place which tell Google the new destination of the threads. My questions are :-
1. What should be my next step when I see <50 old URLs listed in Google.
2. Is it now safe to remove the /forum (old) directory?
3. Do I need any changes to the .htaccess file?
4. Those who've done it; is there any important point you'd want me to consider?