[Greg Malcangi]

Careful here MetalDrummer13, maximising the volume of a mix is just maximising the volume of a mix, it's not mastering! Maximising the volume of a mix is just one small part of the actual mastering process. A good mastering engineer (a rare breed) will analyse a track and adjust it's "feel" and balance, adding sparkle, warmth, width, clarity, depth, polish, etc. (and yes, volume). The mastering engineer will apply some or all of these based on experience, the musical style and the wishes/intentions of the producer. Lastly, it is the mastering engineers job to make the mix sound great on a wide variety of replay systems rather than it sounding it's best just in the studio in which it was mixed. From this simplified explanation of the mastering process you can see that there is not and cannot be any such thing a mastering plugin or automatic mastering process or program. Anything you see marketed as such is just that, marketing! If all you want to do is increase the volume then a limiter such as the Waves L2 or Massey 2007 would fit the bill.

One final observation, you said you had already applied dither. Dither should be the very last process applied to the track, eg., after volume maximising and any other mastering processes.

G