How do u use a mod?

[Avalon]

I downloaded the infinite/expanded population limit mod of Rise of Nations from the internet...There's only one problem...I don't know how to use it! Can someone give me a clear, step-by-step explanation? thnx

[NorthViking]

it should be some readme file in the mod you downloaded, sure you checked ?

this site might help http://ronp.mednickonline.com/ or look the site where you got the mod from