Mods not available to race against as AI...

Hello to everyone. I have a question that hopefully someone can help with. In AMS, when I select one of the vehicle mods that I downloaded,  Super Gt as an example,  the vehicles are available for me to select to drive, but they are not listed in the area where I select the type of opponent or other vehicles I want to have on the track for time trials or races. Is there something I have to do to allow them to appear in that list?

opponent selection is in the veh file and in ams depends on how the creator has built the mod. some mods ams doesn't deal with that very well,

Oh.. ok, thank you for explaining that. I'm still learning about Mods and installing them .