Hi Heinz,
I would probably do this an alternate way.
At the moment there's a "desktop mode" and a "mobile mode", but it's a fair bit of work, for you and for me, to maintain both.
So I've moved more towards making a desktop web app which works well on multiple screen sizes.
I've chatted about this a bit during the webinars, and this "desktop for small screens" approach seems to work well, and ultimately delivers a better result.
Check out
http://www.capesoft.com/accessories/NetTalkUserGroup.htm some specific references to this are;
#114 : 0:04 (Bram)
#119 : 0:24 (Peter)
#122 : 0:39 (Edvard)
#125 : 0:12 (john)
there are more there as well, but I think those cover the basics...
cheers
Bruce