internal url reference

how can I set a particular group to be _self? I have other ads set to _blank, but I want to use an "ad" as a block to reference an internal page. Seems it would be great to allow granular rather than global (individual ad vs all ads) control over this URL linking... Thanks.

For example, is there a conditional that can be written into the ad_views.inc that would tell it to _self a particular ad group?