If I get brave enough to download a mod, does it affect all of my homes?

Thank you Riograce! It's nice to know when others like them.

Thanks Riograce. I tried one of Lewanda's mods, but I must have done something wrong. The sofas were a nice burgundy, but there was a line through the master/kids bedroom and part of a plant was on the floor in front of the parent's bed.

I followed all of Lady's suggestions, and of course backed up the files, but I guess I messed something up. Gotta try again.