I want to copy the dragon armour to change the stats, but CS wont let me copy it. Is there a file on TES that is the normal dragon armour. Or is there a way to copy it?

You mean the Imperial Dragon Armor, the really crappy endgame reward? Each piece is a quest item. To copy it, simply rename the reference ID, uncheck "Quest Item", change "Script" to "NONE" and hit okay. When prompted to "Create New Form", hit okay. Repeat for each piece of armor. Then, you will have your own copy of each piece of non-quest item armor with the ID of your choosing. Then, mess with it how you like. The first thing I did once I beat the game this most recent time was go into the CS and really ramp up the stats on that armor. For an endgame reward, it really sucks (far worse than Daedric/Glass), and so deserves to be better.

Yes it sucked bad which is why i wanted to play with the stats. Also thank you for the help, i planned on hidding it somewhere in the Entrace to the excavtion.

Ok i just made some custom dragon armour, but it does not appear in game. Why would this happen? Sorry for the double post

Did you put it in the right place? Did you mess with anything besides the stats? Did you mess with anything in NifSkope? I couldn't get a sword to appear because the NiNode wasn't assigned to it. No? Did you place it somewhere with no collicion so that it accidently fell through the floor? I test all of my weapons and armor by placing them in the IC Market's A Fighting Chance. Otherwise, I don't know what to tell you. There shouldn't be any problems if you only messed with the stats and were sure to create new forms.

i placed them in the air..? i didn't mess with anything but the stats.