Your on your own to find the tools, google helps
unpack your .health file from healthii with u8extr
copy your health.ash
Unpack my app with u8tool. select open file, 4x.app then unpack
this will take quite awhile and the program will appear frozen, its not its just fucking slow,think an hour to unpack for 43 and add a half hour for 45, and this is the only u8 tool ive found that fully extracts without problems. However as long as you dont delete the app_out directory after you repack you can always start from the next step afterwards to change the screen again.
browse to the app_out /layout/ common directory
overwrite the health.ash here with your health.ash
run u8tool again point the folder option the the app_out directory and then hit pack, within 10 seconds you have your new app
thats all there is to adding your health screen to the csm alpha