It fixes alot of collision files AFAIK. Any documentation I've seen on this has been very vague.
Stupid authors packed it into the gta3.img file, so its hard to tell what has been changed. They also included most of the data files, which are still originals. Only very few have been changed.
Regarding PSA .. Well I still got the files .. About continuing it, more than likely not.
One cool thing that Danikov was doing for PSA, was putting in extra traffic lights around LS where there weren't any.
Pay close attention to the traffic. They will just stop randomly @ non-existant lights. Prime example is at the start of the game, as CJ comes out of the alley, in that area there.
Hmmm, I'll have a look at the patch then. Thanks for the info.
And I hope PSA will be back soon too!