Try patching the MDL file of the Kikka with the MDL Converter tool for the external weapons to display & function. I believe you already have this utility.
I think you're wasting your time using these old CFS1 aircraft in CFS2. If it's not fully animated I suspect this one is actually an old FS5 design. Aircraft specifically designed for CFS2 are far better in every way.
PS. See my reply on your Kikka problem in the CFS2 forum. Keeping track of all these separate topics on different boards is a tad confusing.
