Do the add ons add to the base campaign?

[robc04_1]

As the title states, do the add ons add anytging to the campaign in the base game (like AI improvements), or is the base campaign uneffected by the add ons?

Edit: Also, does it matter if you install the 1.7 patch before or after the add ons?

Thanks

[pipfromslitherine]

All game features and improvements are available in the patches and don't require you to purchase the addons. Obviously some new features (like carryover) are only available on campaigns which are designed to accomodate them.

If you install the 1.7 patch you can activate any expansions using the Unlock Expansions button on the initial launcher window.

Cheers

Pip