Whats more easy to learn and noob-friendly?
And what is more efficient and is it what you use?

Both aren't that hard to learn. They're hard to master. I'm using Adobe CS3, probably moving on to CS4 around January/February. If you want to see the different features, you can learn a lot by looking them up at Wikipedia.

I use Photoshop CS 3 (I bought it one week after Photoshop CS 4 camed out   ). I think the're about similar. But it's really very difficult to learn it, but if somone has good ideas   .

Aww. That's nasty. Probably you bought it at a discount though. And don't forget that you can upgrade to the newer version of Photoshop cheaper now. Although I'm pretty sure that CS3 is sufficient for learning Photoshop extensively. A design teacher of me (an internationally known one) is still using Adobe CS3 suite, so you'll be fine.

What's the name of you design teacher?

Hey, I think adobe has a free upgrade plan for people who bought at times like that, at least they usually do... I'll have to dig.

CS2 and CS3 are quite similar, I really can't say which is easier to learn as I started to learn with CS1

EDIT: Frozzn, it appears you might have just missed the window http://www.adobe.com/go/tn_19582

Yes, I heard something about that as well once before. Did you buy the software online from Adobe or in a shop (Apple retailer, software shop, etc.)? You can try to contact them.

Well, I just bought CS3 some time back, and I have to say it just FEELS better. I don't know what that means, but it just does.

Cs3
Cs2 has some error: start-up slower than Cs3, etc

I've bought it in a softwareshop in my village. What's actually new in Photoshop CS4? I think it has advanced 3-D options   . I will contact Adobe   .

Here's a list of new and enhanced features Adobe has introduced in Photoshop CS4.