bitflipper
To do the same thing manually you'd simply apply a constant gain adjustment that allows your song to meet your target LUFs measurement. This would not alter the sound in any way other than making it quieter (or louder). There'd be no loss of dynamics, no truncated peaks.
 
BTW, since I started this thread, like Jeff I've mostly reverted to the good ol' K-14 standard. The LUFs meter is still useful because it presents a visual for long-term levels, which K-metering does not do for you. But for music not intended for broadcast there is really no need to get hung up on LUFs. 

I've got the Meterplugs K Meter, and I just discovered there's K metering in Ozone 6, so I'm going to give this a try at K14.  I actually used to put the K Meter on the end of the mix bus for K14, but I wasn't properly referencing commercial mixes by not turning them down to level match to my mix, and I think this is huge.  I believe it clouded EQ decisions, especially on the mix bus.  The relative loudness made me think the references were way better, which they probably are, but to my ears, mine compare well when the references are turned down.  I noticed last evening a mix I'd done recently was muddier/darker when reference mixes were level matched to it, and I'd not noticed this before.  I applied only EQ on the mix bus to correct it and rendered it out at -16 LUFS.  This morning on my office computer it compared beautifully, very clear and airy, not squashed at all...really happy with how sounded.  How cool it would be to land in the K14 ballpark without knocking much, if anything, off the top.