How to include a bunch of tex commands globally

[ehud.behar at protonmail.com]

I have a big block of tex commands (about 80 lines in length) that set up theorem environments using the amsthm​ and thmtools​ packages.

To this bunch of tex commands there is also a corresponding LyX module that defines the theorems in the editor (paragraph styles, section 5.3.7 in the customization manual).

I want to avoid this 80 lines code block in my document preamble. It clutters the document structure.

Of course, one can insert the code block as it is inside this:

Preamble
⟨80 lines of code go here⟩
EndPreamble

But this adds the big code block right into my preamble, which, as I said, I want to avoid.

The other option is to save the code block in a tex file (`myPreable.tex` for example) and to load it into my document:

Preamble
\input{myPreamble}EndPreamble

But this means that the file `myPreamble.tex` must be located in the root directory of the LyX project.

Is there any way to load the code block while it is located in the "Applications/LyX.app/Contents/Resources/layouts/" directory? I am about to send this module file and all its accompanying files to a colleague, and I want to spare him from the task of taking care which files go where.

I hope my question is clear.
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