Couple of suggestions:
Sign up for Google webmaster tools at:
1) http://www.google.com/webmasters/
and find out if the page(s) are being indexed/spidered.
2) Submit a site map to include the old pages
3) tweak the content and/or change the file name, title, meta keywords to
let google know what the page is about.
4) Otherwise, create new page with more content considering #3 tips.
5) get some links pointing to the old pages, perhaps from other sites you own.
6) submit these pages to isnare and other article networks using the exact url
as a link back.
7) cross fingers and hope Google’s next PR update (rumored to be first week in April) finds these pages.
Hope this helps.