I found the following in the FAQ. I cannot find this setting anywhere? Can anyone tell me where to find it? It sounds like it might be usful for taking a DAT and having it only scan for "USA" or [U] roms. Thanks

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GoodTools: How can I scan/rebuild/merge good collections with [b] or [o] flags

Settings->Sets->Select Sets: Enter *[[]b?[]]*. This will enable only the [b...] Sets. You can add (separated by ';') the similar expression for 'o' flags. Then click the 'i' button there and it will inverse the selection. Et voila...any set except the ones with [o] and [b] flags are enabled.