If you cannot get the plugin to work, here are two alternatives:
The can not update plugins is because you dont have the matching gm checksum plugin. So, you can usually ignore this message. pcmhacking.net joukey gm checksum plugin
: While Jouko (Joukoy) maintained these specific versions, the community notes that several variations exist, some originally developed by users like Antus and later adapted or expanded to support 1MB PCMs. If you cannot get the plugin to work,
No. It is strictly for (no CD or 32X headers). joukey gm checksum plugin