Error 404 Handler

[mvlcek]

I'd love to see a plugin that handles errors with the following:
...

On the back end, you could manually enter page comparisons between the old site and new site. For example:

• --old site info-- = --new site info--
  
• /oldfolder/oldpage.html = /newparent/newslug
  
• /oldfolder (and everything in it) = /newparent (and everything in it)
  
• Any other variations
  

You could do all this in the .htaccess - and the user wouldn't even see the 404 page.

Or - if you have plain text URLs - you can feed the word(s) to the I18N Search plugin and present the search results.