HT_Parker I am doing something similar on a site and it appears I got it too work.
Note - I am by no means an expert at mod rewrite and this may cause other problems I am not aware of, but it does appear to be working.
Note that Omar says to add it after RewriteBase /, for something similar it only worked for me if I put it after RewriteEngine On BUT before RewriteBase / - Don't know why.
This was to get my header to show up which is in the /images folder - so to get me image to show up I did this:
RewriteEngine On
RewriteRule ^images/imagename\.jpg$ - [L]
RewriteBase /
To get my original files to not be a 404 in SS added this:
RewriteEngine On
RewriteRule ^images/imagename\.jpg$ - [L]
RewriteRule ^filename\.htm$ - [L]
RewriteBase /
That made it so the original file shows up instead of a 404 - Since you are using folders you RewriteRule will need to be a little different.
Now to get the the original file (folder in your case) to redirect to the new page of SS add this or something like it to the bottom of your htacess file after all the mod rewrite stuff
redirect 301 /filename.htm http://www.yourdomain.com/pages/newfilename.html
This is working for me. If anyone sees any issues please post.