updateable, precompiled web and changes to source files

Hello

I have a couple of apps that were deployed using the precompiled,
updateable option. There have now been changes to the .ascx and .aspx
files on the live server and I am wondering how to best merge these
back with the dev system (which is in source control). Will the
"inherits" and "codebehind" headers be automatically corrected when I
copy the files over and recompile, or does this header change need to
be done manually?

Thanks

Paul