The GoodSNES dat for Romcenter has the raw data checksum, not the crc of the whole file. The thing is that Romcenter has different checksum calculators. For normal datafiles, it uses the normal/arcade one which calculates the crc. For SNES dats it uses a different calculation system which skips the header and only reads the raw data. This is specified in the following line of the datfile, in the [DAT] section:

plugin=snes.dll

If you check the plugin folder of your Romcenter instalation, you'll find more for nes and genesis.

If I'm not wrong, CMPro only calculates crc over the whole file, thus even in the case you can convert those dats for CMPro, it would not be usable, because what those dats contain is not a CRC understandable by CMPro.

And yes, like Roman remembered to say, you can convert old and new Romcenter dats for CMPro with Datutil, available at Logiqx.com. I don't know if Logiqx has made provision in the case a different plugin is used.

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