Turning WP Super Cache ON for ajax requests?

Hi there,
I’ve been playing with WP Super Cache for a while and it works brilliantly for normal page requests. The trouble is, I have a lot of ajax requests I want to be served from the cache too:

I’m using a plugin called read-more-right-here that gets a post’s content after the more-link using an ajax call, and appends it to the existing page content (it uses jquery to ‘slide it out’. very snazzy).

It does this by requesting the post URL using an ajax request with a special POST variable attached (in this case wt-rmrh-redirect=1), which triggers the plugin (hooked to ‘init’) to return JUST the post content after the more-link, with it’s own query_posts call.

The trouble is, this isn’t cached, presumably because the .htaccess rules are never triggered due to the POST variable, and wp-super-cache’s hooks are never called. …or something like that ??

So presumably I need to get this plugin’s output written to the /wp-content/cache folder somehow and make a new RewriteRule that’s got RewriteCond %{REQUEST_METHOD} ^POST in it somewhere, instead of !POST.

So, has anyone got anything like this to work? …or does anyone have any pointers? It’s all a bit over my head at the moment and any help would be greatly appreciated!

Cheers!