1) Do not worry about being impolite- I believe it would be impossible for you to do so anyway:)
2) X files cannot be modified, they are extensions of the ''___.mod'' file...the actual model and its textures together.
3)What exactly are you wishingto do with the model(s)? If ou make a large change to the model, then it would be nessecary to delet the two X files, and create new ones- with Taldren's Model Tools, the Recacher. This can be found at
http://208.57.228.3/SFC3Stuff/SFC3_ModelTools.zip.
4) If you are looking for a specific change. like you would like to see a model altered, or would like to have one made, then someone here or myself will be glad to help. Tell me what you really wanted to do- don't be shy, everyone is here is friendly- you like Star Trek, you're our friend!