First, you need to set build_detailed=1 in the Links.pm file.
Then, rather than linking to the jump.cgi link directly to the Detailed page as above. The variables you can use in your templates (and what they evaluate out to) are defined in the Links.pm file (and stuffed into the %GLOBALS hash which is available to all the routines).
$LINKS{build_detail_path} = "$LINKS{build_root_path}/Detailed";
$LINKS{build_detail_url} = "$LINKS{build_root_url}/Detailed";
The template tag is the part in between the {} ie: <%build_detail_path%> and <%build_detail_url%>
You _may_ or _may_not_ have re-defined these else where in the program (most likely in the %GLOBALS hash in HTML_Templates.pm, but as "globals" the above variables should work everywhere.
There were some bugs with building detail pages that were reported here (and I think posted in the FAQ (url below).
http://www.postcards.com FAQ:
http://www.postcards.com/FAQ/LinkSQL/