but you know changing a term which has been used forever, is very hard ^^
Easier for me to tell people that I am installing a mod than a hack, though 'hack' scares the sh*t out of people, and they get suspicious of my profession soon
I also consider small stuff a mod and something large a hack. My basic rules is if it takes me less than 10 minutes it is a mod. Anything else is a hack. This is in newbie time though, so if it takes you 3 minutes. It takes me 20.