Windows 7 throws an error while copying over some of the image files in this pack (from downloads folder to AVWW texturepacks folder), namely the BackgroundScrubCanadianBlueJoint folders buried in LayerBases. It seems to think the filenames are too long and refuses to copy them. List of files I couldn't copy below.
BackgroundScrubCanadianBlueJointGreenNW2
BackgroundScrubCanadianBlueJointGreenNWE
BackgroundScrubCanadianBlueJointGreenNWE2
BackgroundScrubCanadianBlueJointThawingN
BackgroundScrubCanadianBlueJointThawingN2
BackgroundScrubCanadianBlueJointThawingNW
BackgroundScrubCanadianBlueJointThawingNW2
BackgroundScrubCanadianBlueJointThawingNE
BackgroundScrubCanadianBlueJointThawingNE2
Total 9 files in Images/Layer Bases/
I guess its just a simple rename but I haven't tried it myself yet, since I figured the game expects to see certain filenames...