It’s so easy now! See it as a simple HTML webpage with some Javascript, CSS and an embedded Flash object. Creating widgets or applications for Nokia S60 5th edition is not that hard to do. You could use the Nokia WRT Extension for Adobe Dreamweaver or just plain old Notepad. How to package Flash content in a Widget where you zip the whole package and rename it *.wgz …et voila. You have your application.
When you would like to detect the right Flash Player, just us SWFObject (I prefer the static method) as you would with any other Web application. Here’s a handy table which is hidden deep into the Flash lite Documentation at Nokia. 
Combine this with using the AS2 Nokia Platform Services API and the AS2 Nokia components extensions for Flash CS4 you can create very powerful mobile applications. And to finish and test your application. Reserve a Virtual Nokia device for free with the Nokia Remote Device Access Services.
