If You make the right-click on a .milk-file and "Edit with Notepad++", then You can read the codes of the preset (of course read-only, You cannot edit it). But if You scroll down to "warp" and "comp", then sometimes You will see "sampler_imagename" or "texsize_imagename", and this means, that a texture with the exact filename is needed, JPG or PNG. Only if there is "sampler_rand00" or "texsize_rand00" instead, then a special image is not needed, and each image in the textures folder has the chance to appear in the preset.
Because also I myself didn't get some of the necessary textures or the original images simply had looked too ugly for me, I have chosen some replacement textures. But mostly I use the original textures which I got.
Edit:
At least the URL for "MilkDrop plug-in for Winamp" works:
http://www.geisswerks.com/milkdrop/
although the both .html-files there are not longer than the both .html-files on my harddrives.
Jonny Rimkus aka RAVERMEISTER has one of the ultra-archives. You can search for him, You also can PM him in the forums.
At least I am still working on the additional random textures and desktop wallpapers, and I suggest to visit my latest 3 journals on deviantART:
https://sternenmaschinebine.deviantart.com/journal/
and of course You can check out also my gallery and my favourites.