that article is a good starting point.
‘in my header’ is not a very precise location for a widget …
see here for a slightly different example:
http://wordpress.org/support/topic/create-3-horizontal-boxes-between-menu-and-container?replies=15
btw: twenty ten will be overwritten with your next upgrade. consider http://codex.wordpress.org/Child_Themes
I didn’t knew about overwriting with updates 🙂 Thanks!
By header I mean I want to place a menu horizontally, 50px from top, next to the logo on the left (not under a picture like it is after WP installation).
As far as I know, to modify menu by a widget it need to be placed in widget area – that is why I want to create it there to apply JQuery mega menu.
Am I right/clear to you? 🙂
[edit]
I thought about using created widgetarea in a sidebar, placing there div and position it relatively eg. top-150;, left-400px;.
My question: how does widget area behave? is it similar to div or what?:P
Sorry for any language mistakes.