7-zip doesnt use new compression methods unless you tell it too. By default it uses Deflate or Deflate64 for zip files, but theres options like LZMA or bzip.
Most zip compression methods are compatible with other programs like WinRar, WinZip, and windows intergrated zip utilities
So really, its the posters fault for not making sure it worked properly before up loading. Though that doesnt mean go invade their country and shoot them for a tiny mistake or chance error (perhaps it happened during uploading?)
Anyways the poster of the GRF solved it, so lets stop argueing about stuff and get back on topic
There may be a lot of vehicles in the set but I can't shake the feeling "I want more", so perhaps there could be one or two more things, or perhaps have a generic set for north american style vehicles, like 4x4 and 4x6 trucks with long hoods, and busses with the doors on the right side.
It might also be nice to have Light Rail Trams that are essentially small trains for use within cities where rail wont go or connecting neighborhoods and towns together