Quote: "1.I know you can sell your games... but can you sell your games with model packs (like if you use them model pack items in the game)"
The official model packs, yes.
Quote: "
2.I bought some 3d models how/were can i learn to import them"
There are numerous tutorials in these forums. There are also free segment and entity creations programs provided by the game creators. There are also various user made programs which will import your entities into fpsc.
Quote: "3.What is the difference between the two add/insert level? because i goto build a game and get error's and after i build game go to load new lvl and it crashes..."
Could you explain this problem a little better please.
Quote: "4.How do i change the icon after my "build game" and the description on it?"
I believe there is an icon changer made by ngin (spelling?) on these forums do a search. As for the description you could use reshack.
Quote: "5.Can you make it so you create the game and some how the people have to buy another part/path to play online?"
Single player and multiplayer games are created separately. So you just have them as separate options to buy.
Quote: "6.What is best way to secure game from being cracked (if you plan to sell it)"
If you mean stopping people from stealing your media there is currently only one application that does this: Vishnu. Search the forums for it.
Quote: "7.What all tools are good to add to fpsc (that are legal to have in your game if you sell it if they even deal with ingame stuff)"
http://forum.thegamecreators.com/?m=forum_view&t=82333&b=24
Quote: "8.What are some good free/cheap models for fpsc that you can sell with your game?"
Look in the models and media forum for some good free stuff. Just check the license first.
Quote: "9.any1 know of any good game publisher's (you can PM me this one)"
...
Quote: "10.Does fpsc have to be included in credits of game (i will probelly have it there any way)"
Yes. Section 4 of the license tells you what you must put in your EULA