728 and Mobipocket Reader

I have installed several versions of Mobipocket Reader on my 728 and they all install fine but when I run them they all come up with "Please install the latest version to read this book". I am also unable to close the program and have to soft reset. On one of your other messages it was mentioned that someone had put aygshell.dll in the folder and it worked fine, can you tell me how to get the dll.
Many thanks octebra.

cmonex has several versions on her site:

http://www.hpcmonex.net/izemize.htm

As I recall 4.8 was the last version of Mobipocket to be directly compatible with H/PCs. (And I always had the same problem closing it, except with the standard workaround: Alt+tap on the app's title on the taskbar.)