If it is still running android 2.3 then you should just be able to move apps to sd using the Applications menu of the phone (select app, and if it has a "move to sd" button you can do it). System apps can't be moved (but live in a different partition anyway, so not an issue), and widgets will break if you move the app to SD.
If you are running Android 4, I'm afraid this feature is no longer supported.