Well I've already done that, but I want to know if they show up on FRED, like I said, I can't look myself because it won't load because of some HTL thing and it wants me to add something to the FRED target on properties and all that.
And how to add the stuff on the target and what the target should look like. 
It won't load because you're trying to load an HTL model with out -htl. But let's address the bigger problem first.
Contrary to TrashMan's assertion, it is a BAD IDEA to put HTL models in /data. That will break retail, and won't let you run with default graphics.
All HTL models should go in mediavps. End of story.
Now, make a shortcut to FRED. Right-click on it and select properties. find the Target box. go to the end of the target box, and add
-mod mediavps -htl
so it should look like this:
"(path)\(fred exe name)" -mod mediavps -htl
then run the shortcut.