hiya!
it's probably easiest to do this from inside the Browser window for Genres.
click on the Browse eye. select the genre you want to adjust. select "all" under artist, and "all" under albums.
now select all the songs that show up. right-click the blue mass, and select "Get info". say "yes" to the dialog box that comes up. the EQ settings is down at the bottom of the screen that comes up.
(to just do a single artist or album, change the settings in the browser window accordingly, or just sort on artist or album in the
main library window to clump together conveniently everything to be selected.)
love, b