How do you decompress .GCA files?

[CBone]

I have a .GCA file that I need to decompress for a cd. Someone pointed me to this japanese program, GCompressionArchiver but the program is super gimpy. Instructions or a point at another program would be very helpful.

Cbone

 

[nukefarmer]

there's an english version (console only) here (at the bottom of the page)