Twice in one scene

This is REALLY hard to explain, but I'll do my best.
Is there an editing program in which I can have the same person twice in one scene?
Like, for instance, I'm filmed sitting on the couch, talking. I stop the camera, change my appearance a bit, go in from of a green screen and stand there. I stop the camera. Would there be a way gto merge them so in the same scene I'm sitting on the couch, while you see me(different apperance) standing right next to me?
If so, is there a tutorial?

search rotoscoping on this forum. I know 2 people have post topics on it with tutorials at least.

Easy way. Tripod. Film what you want to do as the first subject. Then film as the second without moving the tripod. Then crop the two together.

Here's the thread Yates was talking about:
http://homegrownforums.com/index.php?showt...&hl=rotoscoping
Ima move that too the tutorial section, it's a good tutorial.

Edit; Mikes way is prolly easier, if you don't have the software...

Awesome, Thanks.

Is everything working like?
I'll leave it open case you need to ask any questions.

[offtopic]

Baz, is that sam evans in your avatar?

[/offtopic]

It is, haha.
I even got a PM saying how it has been making them laugh for the past 2minutes.

yes it is

Damn my internet is running slow...