I have resolved this issue by taking the item.php file and placing the body of the page in conditional statements. Example, if category_parent_id = (jobs id) then use the following template, OR if category_parent_id = (real estate id) then use this template, ELSE use the following generic template.
Example:
...
if (osc_category_parent_id() == 6) { // Job Parent Category ID
Job Template
} elseif (osc_category_parent_id() == 3 { // Real Estate Parent Category ID
Real Estate Template
} else { // Default template
Default Template
}
Yes, this means hacking away at the theme code, but my theme has been heavily modified already. No upgrading for me.