Hi Jeff,
let someone who really knows the code tell me how to do this
I really know the code

and it’s not possible with the current 1.8 beta 1 >:(
With the current 1.8 beta 1 the Phx [+as. tv_external_url+] is unknown and not set by AjaxSearch
To do that, I need for each document found, catch the id of TV linked and for each TV id, renders the TV output values as a ajaxSearch TV like [+as.TV_name+]
May be, this new feature could be set with a global new parameter &tvPhx=`1`.
The version 1.8 is now ready and tested (utf8 and latin1), but I could try to solve your request by adding this new feature, if somebody is also interested in.