can you create new char and keep all the quests/lvls etc ?

only on PC through the use of console commands.

Edit: but from what I hear, you can transfer save games from your PC to your xbox, so if you have a friend with it on PC...

This post was edited by Mystic_Rising on Nov 23 2011 11:49am

Nope, gotta start from scratch.

Nightingale set from the thieves quest line, retextured on the pc.

oh haha, nothing i can get then.

why not

You can get the armor set itself, minus the pretty retexture.

It looks like this.

If i find a horse am i able to keep it?
If yes, how?
when ever i get off he goes away. Im not able to get him in the stable and if i fast travel he doesnt come with me.

He may run off and die. If you do the Dark Brotherhood quests, you get a certain invincible horse that you may or may not remember.