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In this Screencast I show you how to turn Lubuntu 10.04 into Ubuntu 10.04 from the look and feel perspective. You need the following:http://box-look.org/content/show.php/Ambiance_karlinux?content=124916https://launchpad.net/ubuntu-wallpapers
Click to play
With Gimp you can edit the button image and delete the text simply. Make sure to crop the image around the icon after deleting the text.
/usr/share/lubuntu/images I guess.
This is a little bit more complicated. Eine Anleitung auf Deutsch : http://wiki.ubuntuusers.de/Mauszeiger#ueber-die-KonsoleA Howto in english: http://ubuntuforums.org/showthread.php?t=113233
Yes you can also install the ubuntu-wallpapers package but then you will also get all the other wallpapers installed.
Yes Window border and buttons seem not to so easy to imitate with openbox.
You can get the Backgroundimage , Lubuntu Menu Button Image and the background image for the panel from this archive : http://archive.ubuntu.com/ubuntu/pool/universe/l/lubuntu-artwork/lubuntu...Just take a look in the /usr/share/ directory. The default Icon-Theme is called elementary-monochrome I guess and you can get it either from the ubuntu software repository or from gnome-look.org. Hope this helps ;)
More information about text formats