Thanks not2easy for the in-depth response. The URL structure is similar to your examples above, just to clarify, is it best to try and keep the URLs as close to the same as possible (following the domain)? I ask because the developers argued categorising a bunch of pages within a sub-directory would help SEO.
For example, we used to have pages like [
olddomain...] [
olddomain...] etc
and they were suggesting should now be arranged as [
newdomain...] [
newdomain...]
I.e. should I lose the /help/ type sub-directories?
I'll set about harvesting the title records next in that case. And yes, one of the SEOchat members had put together a plan and had (AFAIK) intended to help me with this but unfortunately he's no longer reachable - there was also a little htaccess script he'd written (also now unreachable) but the rough plan went something like this:
1. Develop the new site as you are currently doing. Get it ready to deploy
2. Backup your old site, then make a backup of you new site.
3. Now we create the Redirects from the old site to the new site. The ideal situation is all the URL's would all be the same except for the domain name. That would allow for the simplest solution. In your case I suspect you will be changing both the domain and the internal URL structure. This means you will have to create a list of redirects from the old site. In either case you will have to maintain ownership and host the old domain. Install the appropriate redirects and you done. Do not deply the modified htaccess file to the old domain yet.
4. Deploy your new site. You can host both on the same server if you like. Just make sure the new site is up an running properly.
5. Once you are positive that the new site is running properly then you upload the modified htaccess file to the old domain and once you test it to make sure the redirects are working properly you're done. At that point you just need to keep an eye on it till you are positive you haven't missed any URLs. I generally test the redirects by making sure all my backlinks on the old site go to the proper pages on the new site.
If that sounds right?