Assuming you have a WM6.5.5 :)
For WP7 Style SMS you can start here --> http://forum.xda-developers.com/showthread.php?t=1302747
For Phone lockscreen you may try this one --> http://forum.xda-developers.com/showthread.php?t=787219
Hope you find...
Question is what kind of theme do you want? There many kinds of themes out there. There are themes in cab files which you can instantly install on your device, others in tsk files which you can just copy and paste to your device memory or sd card,...
can I flashing atom life white with 128MB mini sd?
my current ROM wm6.0 original.
Yes you can. Refer to first post for the instructions. Happy flashing. :)