You'll see I have no experience with modding, and so i have three questions:
1. How can I get the Frigate_PsiLight file? Have I to use the convert xsi and how can I convert them?
2. do you mean that I have to replace the "frigate_psilight" with my own model?
3. I'm not sure if you answered directly at my question (if I just misanderstanded you, pleas forgive me
) : how can I make all the meshes visible in the modtool?