Player board(s) with different at start setup?

Hello fellow module makers,

How does one make player boards (that have different initial units and economies, and powers) for each side that would be excluded from the game if not selected at start-up?

For example, player1 chooses empire X. That Empire has two different setup boards. The selected board is used during play to hold At-Start units and economy (and any special rules). It should be visible to all players. The other board(s) would not be used (or better hidden) to reduce any confusion on selecting/viewing available builds and current economy.

Since there may be (in later add-ons) more empires to choose from with their own multi-start setups, it seems cumbersome to delineate all the possible combinations as selectable scenarios.

Please suggest some clever solutions.