I'm in the finishing stages of moving a site from Wordpress.com to a privately hosted .org installation.

I've purchased the site-redirect upgrade and this is working fine, however on the new installation I have (and would like to have) a different permalink structure to the one offered on .com.

I need to find a way to redirect on the new site, from the old permalink structure to the new (/%postname%-%post_id%.html).

To make things more difficult, I'm running on IIS6 (sorry) and using the Helicon ISAPI_Rewrite plugin to use .htaccess - which has a different syntax to mod_rewrite. Docs are here: http://www.helicontech.com/isapi_rewrite/doc/

Can anyone help?