OK I have a few questions. Who knows an answer, the number of the question or the question writes them please even as the first line so that I answer can assign. If a question is answered and I have understood them I extinguish them, so even if already an answer existed, nevertheless, try to answer the question. Pictures and or videos to the better understanding are welcome. If you a question does not understand it says.
This means answered

1. : How do I use the Pandamic addon with XSI 4.2??
2. : Is there an easy possibility without XSI the file to mesh to format??
3. : Must I add light in the model or does go also in the Zero editor??
4. : Can I change on formatting to mesh the Texture still and if so like??
5. : How do I make glass? (sry Sky I it has not understood really) 6. : How do I provide a door opens as soon as before it stands?? (on both sides and unilaterally)
7. : How do I provide movements?? For example, with the spaceships which deliver the wings by the start.
8. : How can I lay by a closed body (for example, a cube) an opening (for example, a tube)?? 9. : Can I format on a surface after him too mesh patterns as texture add??
10.: How do I provide material itself, For example, in the wind moves??
11.: How do I make a Droiden/a vehicle/ a person itself on keystroke moved??
12.: Must I follow with XSI something if an object has to do as for example a spaceship in the play apart break??

I hope you can help me and that I have forgotten no question

3: Lights are added in ZeroEditor.
4: If you UVed your model to textures wich only the model uses, you can just paint over them.

Sorry but I cant understand the rest of your questions(even though im german). If you add the questions in german i could understand and maybe translate them into (no offence) better english.

what means UVed??
This means answered
1. : Wie benutze ich das Pandamic Addon mit XSI 4.2??
2. : Gibt es eine einfache alternative zum XSI Pandamic Addon??
3. : Wird das Licht in XSI Mod Tool oder im Zero Editor hinzugefügt??
4. : Kann ich nach dem Formatieren zu mesh die Farben noch ändern und wenn ja, wie??
5. : Wie erstelle ich Glas? (sry Sky I it has not understood really) 6. : Wie mache ich eine Tür, die aufgeht wenn ich davor stehe?? (Einseitig und beitseitig?)
7. : Wie mache ich bewegungen?? Zum Beispiel bei einem startenden Raumschiff, das die Flügel ausbreitet??
8. : Wie kann ich durch einen Körper (z.B.: einen Würfel) eine Öffnung legen (z.B.: eineröhre)?? 9. : Kann ich nach dem Formatieren zu mesh auch aus einer einheitlich farbigen Wand ein Muster auf diese Wand machen??
10.: Wie erstelle ich Stoff, der sich zum Beispiel im Wind bewegt??
11.: Wie mache ich einen Droiden/ein Fahrzeug/eine Person Die sich auf Tastendruck bewegt??(Beispiel: Ein Droide der beim Vorwärtsgehen die Beine bewegt.)
12.: Muss ich mit XSI Mod Tool etwas bestimmtes machen, damit beispielsweise ein Raumschiff beim zerstören auseinaderbricht??

Are you german or english??

1: How would i use the Pandemic Addon with XSI 4.2?
If you mean the Mod Tool 4.2, it wont work. In XSI Foundations/Essentials/Advanced 4.2 you just go to File>Addons(?)>Install.

2: Is there an easy alternative to the XSI Pandemic Addon?
There are Reps mshex for XSI Modtool, Mshex for Max, BConstructor for MilkShape and ModelViewer for all .vrml exporting programs.

3:

4: Is it possible to change the texture after export to .msh?
Yes, if the model has textures, which are only used by this model you can just paint over the texture in Photoshop or Gimp.

5: How would i make models transparent(glas)?
You need a texture with an alpha channel applied to the section of the model which later gets transparent. You can either apply transparency via Edit Flags in XSI or hex the .msh to enable transparency(Everything you need thread).

6: How would i create a door which opens when i come close?
Somewhere on Psychofreds site is a .emdl file which contains a door, use that as reference for the setup. You again need animations.

7: How would i create movements?
Animations. Just look up some tutorials in the web. There is a tutorial about setting up and exporting animations for SWBF by minilogoguy(?).

8: How would i cut a hole into an object?
You could either draw new edges and extrude them in or model the shape of the entrance in one model and use Boolean Difference(look XSI exclusive things up in the XSI documentation).

9: Is it possible to paint patterns on a wall which had only one color before(after export)?
If you have UVed the wall to a texture only this wall uses you can again use Photoshop or Gimp to apply the patterns.

10: How would i create fabric which moves in(?) the wind?
You have to use Create Cloth from the Pandemic exporter, quite self-explanatory. The collision objects have to be Primitives.

11: How would i create a droid/vehicle/person which moves when i press a button(for example: A droid which moves his legs when moving forward?
I dont really understand the question...

12: Do i have to do(?) something special in XSI Mod Tool to have a spaceship break into pieces?
You have to create chunks. Chunks should be parts of your model which are separate .msh files. You then reference them in the explosion .odf.