Fixing my addons (I have a few questions)

[DEL]So after holding a long break from making my addons i forgot some things/ i have a few problems, that mabye some of you can help me with.

  1. I made a skin for the CSS MP5 but whenever people downloaded it, it also changed the skin on the MP5 if they had downloaded the CSS weapons pack. So my CSS skin(s) would change the skin on all other CSS weapon addons.
  2. Im using the “weapon_sim_base” for my weapons. Is there any way i can do so people dont have to download that weapon base from the workshop too?
  3. Some people said that they could’nt see the weapons bacause they did not own CSS. Can this be fixed or do they have to own CSS?
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    IGNORE THIS POST. IM MOVING IT TO ANOTHER SECTION