Imperial campaign on RTW, BI and ALEX at the same time?

Hello, I'm trying to make a campaign available as an imperial campaign (well, not as a provincial campaign rather) on every exe at once, without having to change files.

It works when it's not modfoldered, using -mod: for BI and -noalexander for Alex.
The problem is with modfoldered campaigns in BI, as I have to use -mod:my_campaign for BI, which results in a provincial campaign.

Is there a way to keep only one set of files, and use imperial campaign in every exe?

Thanks in advance.