How to do a picture edit like this on paint.net if possible ? (pic in details)?

i am aware someone out there knows how to do this so internet marketing asking.one of my buddies did a edit of probably my photos, and at this point im trying to puzzle out how to complete it myself so i can do the following myself.anyone possess any idea easy methods to do the idea
Just before pic:

http://twitpic.com/4vb4mz
after pic:

http://twitpic.com/4vb3z1

whenever anyone stats this released, or knows when there is a course, please listing a url or the particular steps below(:
Give thanks you(:

Use the lasso select tool to select the female’s outline.
Cut and also copy this to a new record.Create a brand new layer to your background and paste ones choice in to it.
Compress your photo and help save it.Work with the local Paint web format, you can apply further enhancing.
This town is speedy and grubby; be extra careful while using selection than We were.

https://picasaweb.yahoo and google.com/hughva/PaintTest#5604517868733537714

It has been done in a of several image manipulation programmes, one I would likely use can be photoshop.

It seems as if they have got cut the actual girl out while using ‘pen’ tool and fell her over the different history, probably one found by google images

read more here to understand about the particular ‘pen’ tool
http://www.myspace.com/watchv=ANcO0l9I5p0.