acad.lsp-acaddoc.lps & ss:startup

If I have a function I want to run on every drawing it seems the obvious
solution is to create an ss:startup routine in AcadDoc.lsp and put
it in there.
If I have a function I want to run only once per session it again seems
obvious to create a ss:startup routine in Acad.lsp and put
it in there.
However, what if I want to do both? Obviously having two ss:startup routines
in two different files is not going to work.
Is there an elegant solution for this problem?
Thanks

 

True Robert, I wasnt to sure about my code though, it was simply a "command"
to run a vba macro.
But I figured, what the heck, cant hurt to try so I did. It worked just
fine.
Thanks

 

Another way would be to use one (1) acaddoc.lsp and the (vl-bb-xxx) functions to
store/read an indicator of whether an operation has been run once.