...i seriously hav no XXX idea wat to do. 
I gather from that remark that you have not used the Scenario Editor. The bad news is that there is somewhat more work involved in getting a new loco operational in RW than in Trainz. You also need to set up a Driver—even in free roam.
As in Extremes, using the Editors is what separates the men from the boys. The good news is that RW is not nearly so secretive about such details of the game. There is much information available from within the game and on the various forums.
Begin by studying the Creator Manual that you can find on the first Train Simulator 2012 screen:
From the top menu, select Tools & Docs. Under Documents on the left, click the link to Creator Manual.
Sections 4.3 “Placing a Player Train†& 4.4 “Adding a Driver†are what answer your immediate question, but you will need to study other sections to learn the basic moves.
If you ask specific, detailed, questions about anything that gives you trouble, I’ll clarify.
About your language: Using asterisks while leaving your meaning clear will not save you from getting your butt kicked off of the forum.
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