I did do it with 1 click install. What's funny is...I did use it to remove it, but for some reason it didn't and just left it in there.
So I went in and tried from your idea to do "chown myusername filename" on the file that was holding up the zencart folder from being deleted. It tells me:
chown: changing ownership of `mysql_upgrade_zencart_110_to_112.sql': Operation not permitted"
So I'm again out of ideas. What do you think?
Anyone else have this problem and solve it? I'd hate to bug DreamHost about this right with the sluggish server hell and other issues at the present moment.