I'm pretty busy right now, but heres a link to site with loads of high resolution images of the Earth, and they also have cloud textures, as well as pre mad bump maps...

So check it out.... Here

I will be able to talk better later.

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www.stevenegan-cgi.com

"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"

Ok! thanks for the earth images.

Ok! so now i took all of the suggestions, this time i was really care full about lights as well as textures.
so, what do you think?

Attached Images

and one more.

Attached Images

I was looking at my pics and realized, i need to fix it a bit, shadows...
any ways here is it.

Attached Thumbnails

Sorry for the big pic, it was 640 in my comp, don't know why is it that big in this site.