This is a nice emulator with many features, including a "eagle" mode which should make games look better. On my old PC I noticed RockNES wasn't particulary fast. But with both the advance of PC's and RockNES the speed difference (compared to other emulators) should be neglible.
After the first run, RockNES creates a ROCKNES.CFG file which can be edited with any text editor to set options for sound, video, controllers etc.
RockNES also s the Game Genie, see the ROCKNES.TXT file included in the ZIP file for more information on how to use Game Genie codes with RockNES.
