How to extend a standard layouts

[racoon]

By default LyX loads standard layouts and insets. Is there a way to 
extend them without overwriting the default .inc file and without using 
a module?

Let's say I want to extend the standard Note style.
I don't want to use a module since I want to make a non-optional change 
to the Note inset. For example, I want to use another font size for all 
LyX notes.

If I understood correctly, I can just put a copy of the stdinset.inc 
file from the library to the user directory. But this will have the 
unwelcome effect to overwrite whatever is in the stdinset.inc in the 
library directory. So, to avoid unwanted consequences, I will have to 
update my user stdinset.inc every time the library stdinset.inc changes, 
for example, in a new version of LyX.

So I would rather like to *extend* the current library file by just the 
font-size changes by

InsetLayout Note:Note
    CopyStyle Note
    Font
        Size                Small
    EndFont
End

So LyX should load the library's stdinset.inc first and then load the 
code that extends it next.

Is there currently a way to do this?

Daniel