That's what I'm doing, starting with the 727. Making a list of good links and bad. For sites like AVSIM, just copy the description, go to the FSX repaints section of the library and paste it in. I have found all of them that way so far (but I'm starting from the end and working forward).

Seems like the ones hosted by Flightsim are giving me error messages. The ones hosted by CS and AVSIM seem to be good so far.

I think you have to go to the McPhat website to get their free liveries now. I know they recently remodeled their website (I spoke with Terrence the other day) and I'm not sure whether they have the freeware up or not yet. I'm talking about the "Ultra High Definition Texture." You're only likely to find one or two free UHDT paints for a given airplane. They do sell packages, though. I have a couple and they are nice, especially up close, where normal definition turns into a slurry like you find at the bottom of your cereal bowl. At a normal distance though, the difference is less pronounced.

Hopefully we can weed out the dead links, and maybe even get in touch with the artists and see about getting them posted again. I have found some really nice ones by James Littler that are MIA. Here's an example of what I'm doing:

***Avianca Colombia Boeing 727-200 by James Littler = ERROR from Flightsim
***LAS Colombia Boeing 727-200 by James Littler = ERROR from Flightsim
***SAM Colombia Boeing 727-200 by James Littler = ERROR from Flightsim
British Airways B-ABSY 727-100 by Nathan Phillips = GOOD Captain Sim
727-200 another company/RE British Airways B-ACWF by Nathan Phillips = GOOD from Captain Sim
Old British Airways B-ACAA by Nathan Phillips = GOOD from Captain Sim
727-100 another company/RE Red Tail British Airways B-AXVY by Nathan Phillips = GOOD from Captain Sim
727-200 another company Trump Airlines by Nathan Phillips = GOOD from Captain Sim
89th Air Lift Wing USAF 03356 727-200 another company by Nathan Phillips = GOOD from Captain Sim
USAF 7340 89th Air Lift Wing 727-200 another company by Nathan Phillips = GOOD from Captain Sim