emerald rom here ?

could anyone tell me why is it like that?

It's in a .rar file, you'll have to use WinRAR to make it usable.

No, you can also use 7-zip, which is a better all-around tool, and it is under a free license (is winrar too?). Anyway, it also extracts .7z.

Replying to #3

Yeah I use 7-Zip File Manager even in Linux under Wine