I'm trying to create a simple search menu (ala Google) with RSD. So far I just get a submit button always to the left to my edit input.

How should I create a simple form with an input text and a submit button next to it? Probably is very simple but I cannot manage it.

Place a form container in your page. Now place a button and an input into the container. Next float the button or the input left or right depending on your need. Adjust the width of the form container and margins and or padding of your elements to get the needed results.