tedster - 4:17 am on Sep 26, 2008 (gmt 0)

If you only serve secure files from the subdomain, then the non-secure pages should result in a 404 response when the https protocol is requested. Those urls should just fall out of the index rather quickly.

But first you'll need to sort out the file locations and your internal linking. Make sure that links out of the secure subdomain are absolute and only use the http protocol - or your visitors will also get the 404.