Questions reguarding addons

[Questions reguarding addons]

Still dosent answer two of my questions...

[Questions reguarding addons]

Ok with steam ...

How do I install addons?

How do I install/run more then one addon at a time?

[Questions reguarding the game]

Ok. So I purchased the game via steam.

Now for my questions...

What are some reasources for a noob to the arma series? I have a feeling im going to feel very overwhelmed.

Have the lame lame LAME wrong sounds been fixed? Because an A10's gun sounding like a machine gun upsets me...

A10's useful when being flown because that plane really appeals to me.

Game types? Where is the most action and fun game type wise?

Mods... I hear there is about a million mods... which ones are necessary?

Thanks guys.