Aicarriers add on issues

I've been using aicarriers for a while now and find it an absolutely amazing addon. However, as of late, it was getting somewhat redundant landing on the same carriers. As a result, I decided to get some add ons for it. Being a huge fan of Sci-fi in general, I got the Halo Ringworld training site add-on. However, when I tried to run it, a message popped up saying "create object frigate_hector_leo failed". I was a little disappointed, but got another add-on: space places. Now, this one generated fine, but I can't find and/or even see the model. Please help!