Same here. Currently Win 7 ultimat 64 bit.I have trouble unzipping/uncompressing Misa500. I get incompatible compression data for over 200 items. I've tried 7zip and winzip both to no avail. Anybody else? I'm not new to zipping and unzipping files and I've had no problems with other zipped files. Just the Misa500. The file isn't corrupted because I can still use Misa's textures after downloading. I just can't get it to unzip properly. I've also downloaded the file from planet minecraft just in case. Still doesn't work.
Tried to open the zip-file just with the win explorer and copy all to a new folder,
after that going thru the procedure to prepare the new folder as it is mentioned on the first post,
copied the hole folder into the taxturepack folder and started ftb.
I just tested it briefly and it worked so fare. Hope i could help.