Hi.

1. How do I make the player able to interact with items? For example: Picking up weapons, sitting on chairs, sleeping in bedrolls, etc.
Note: The player IS able to pick up stuff such as coins, apples, etc, but not weapons.

2. Bonus question: My cell seems very quiet, is there a way to add music/ambiance somehow?

3. EDIT: Extra Bonus question: Is there any hotkey for Havok simulation?

Thanks.

4. How do you make certain actors allied with each other? Do I need to create a new faction and put all my actors in it?

*bump*

Update on question #4. I made a new faction, I put all the actors that I wanted in there but they don't seem to care if I go around and kill their guys one-by-one.

5. How do I make guys stronger? I added "special actors" to my map Kematu's guards (Al'kir dudes), they are not in the form of "lvlwhatever" -so they don't seem to scale with the player's level automatically.
Is there a "lvlwhatever" version of these guys that I can use?

On 2. if you edit the cell properies you can set ambient sounds.

On 1 if you duplicate an existing item and then adjust whatever it will have the right type (all those things you mention have a standard activation (which is the one you want) so that is set then)

On 4. you need to set their agressivity etc. there is a tab on creature that says wether they will help friends or not.

On 3 there is a havok key somewhere yes, look for it in the creation kit.

overall I think you need to browse all the tabs better since these are things you can just see if you look. Or read / search on creationkit.com