What program is that you are using? Also what file types can you export to?
You will end up needing Milkshape 3D to import the model, then export it as a .cmp, afterwards, you will have to open it up in HardCMP and use that for your hardpoints(which you know). There are a few good tutorials around the site that shall help you. I will edit my post in a few minutes to point you in the right direction
Edit: saw the program you are using. I will update yet again with what file type to export to.
Open the model up in blender, then goto File>Export>Wavefront(.obj) Afterwards open up Milkshape and click File>import>Wavefront OBJ.
To export from Milkshape to CMP, use the CMP exporter plugin. If you dont have Milkshape, you can get it at the following link. It includes the plugin with it