ok guys i have a very basic/stupid question.

I got BI just yesterday. Till now i ve been playing RTW. In RTW i had the play all factions mod on (pretty basic thing) and i added/modified several units and mercs. I didnt messed though with resources. Now i got BI and since its patch 1,6 is already out, the logical thing is to install it befaore i start campaigning.

My questions:

1) Before i install BI do i have to reinstall RTW in a clean instalation, install BI-1.6 and then re-add all those units i changed?
Or i can install it over my slightly modded without losing all this work i have done on it? (i wish i wish)

2) Does BI have totally seperate folders or the .text files and units are messed with those of RTW?

3) i tried several times to download 1.6 but the link is broken is there another place i can get it from?

Thank you in advance