Upgrade question...Skin files overwrite necessary?

I'm running 2.5.4 and am wondering if I really need to overwrite all those files to get to 2.5.5.

I made some skin changes and would like to not have to do that again.

Thanks!

[MrZeropage]

Yes, you always have to overwrite all the Files in order to get all Feature and no errors.

If you want to port your adaptions, compare your Skin-File with the new one and port over your adaptions to the new file.
I prefer the tool "Beyond Compare 2" for that, just ask Google