Two intentical views with different paths, to work around old category/tid/tid links?

I've recently updated taxonomy_menu, pathauto and views. Before, in the old version of taxonomy_menu, the menu linked to my content like this: /category/tid/tid. I've now set up much nicer pathauto aliases (term_name/term_name/etc) where the paths have human readable names instead of numbered id's.

Taxonomy_menu and pathauto are working together nicely, and I'm very excited about this update. The problem is old hard links in my content. Throughout my site there are 500+ links referring to the old category/tid/tid that I don't want to have to go through and update manually.

I've looked at a couple of ways to try and work around this, and it seems the easiest way is to set up a clone of my main taxonomy view (that pathauto and taxonomy_menu use), name it something like taxonomy_term_legacy, and change the path (in the view) to behave like the old /category/tid/tid. How should I go about this?

This is different from the other Issues I could find here - because I'm not looking to change the paths of my menu, only create a 'catch' for my old hard links. I need two paths for each term. The readme.txt shows you how to change it back, I think, but not how to do both. (I find the readme instructions a bit vague - don't completely understand them)

Currently I've got Arguments:

Taxonomy: Term ID (with depth)
Taxonomy: Term ID depth modifier

and Path: category/%/%

but it's not working! It's very important that I get this working, because the "live" version of the site is running Drupal 6.6, and I need to finish this crucial detail before I upload the latest version (with all modules updated).

Any suggestions (or other solutions) warmly welcome.
Thanks a million!