Allow Custom Groups or Keywords

Wait a few days and FFCat will be released and will let you do exactly that.
It's freeware, open code, portable.
Here's a preview of how it works (Note that the video is of an early version, FFCat is much better now):
http://www.youtube.com/watch?v=eJuv6LUOc5M

Double clicking a filter will open it in FilterForge, so you can watch the results in succession by going down the list of filters.

For more details on what's in FFCat, take a look at the following threads:
http://www.filterforge.com/forum/read...#nav_start
and http://www.filterforge.com/forum/read...5&TID=9806.

Note that the latest and greatest version is not online yet, but it will be soon.

Hi Guys, just curious for an update on when we can expect FFCat to be released?

Cheers.

it MAY be available in MAY

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Definitly before the end of next month.

Although reading this it is not true

Thanks for the update and the news I am waiting for the new upcoming era of using filter forge in a much better and new way much better than is possible now thanks to you FFCat

It's already available for a few months...
Check out FFCat is out of beta thread, or just dowload it from http://sites.google.com/site/morgantaos/FFCat.rar

Unfortunatly, the answer to both your questions is no.

FFCat is a tool that reads some of the information that is written into the filter file (.ffxml file). The default categories are not written in the filter, they are determined by FF's online library.
As for test images, FFCat does not render anything, it just extracts info from the onine library and FF's cache. If you double click a filter inside FFCat, it will open in FF. You only need to load your test photo once in FF, and each filter you double click in FFCat will open with that same photo in FF.