  We present a new set of multi-million particle SPH simulations of the
formation of disk dominated galaxies in a cosmological context. Some of these
galaxies are higher resolution versions of the models already described in
Governato et al (2007). To correctly compare simulations with observations we
create artificial images of our simulations and from them measure photometric
Bulge to Disk (B/D) ratios and disk scale lengths. We show how feedback and
high force and mass resolution are necessary ingredients to form galaxies that
have flatter rotation curves, larger I band disk scale lengths and smaller B/D
ratios. A new simulated disk galaxy has an I-band disk scale length of 9.2 kpc
and a B/D flux ratio of 0.64 (face on, dust reddened).
