The following plugins need to updated :
Custom Fields Permalink
Custom Field Template
A small personal plugin
Please write 'I've actually read it' at the top of your bid so I know that you've read this description.
and site needs to be updated to current Wordpress.
If another plugin can be used and tied in to the above personal plugin, all the better, no need to update the other old code. The personal plugin (just a custom post plugin) does need to be updated for sure, though. The current Wordpress is a 2012 version.