Originally Posted by dogfooduk
Is there any way I can get that dialogue box back from when it was first rooted so I can have a play with the different reading apps before making a final choice?
Yes there is.
You have to go to Settings, the Android ones not Settings on the Sony Homescreen, you should find them when you go to the launcher you installed during rooting the T1 (probably ADW Launcher).
In thew Settings menu choose Applications, then Manage Applications.
Now you have to scroll through the list till you find the App that you've set as standard (the Sony one is simply called Reader) and tap on it.
On the next screen there is the section Luanch by default (you might have to scroll down a bit) if you click on Clear defaults the box asking you which App you want to use should come back when you open a book.