i didn't notice anything in the configuration files for Futallaby for adding image replies, so i added that feature (with my ability to use Copy and Paste). i still have some cosmetic spacing issues to address, but other than that it works okay.
the thumbnails in image replies are set to be exactly half the size of whatever the thumbnail size is set to in the configuration file. if you change the configuration file to allow larger thumbnails, the previously generated image reply thumbnails probably won't look very good, as they'll be stretched out.
i can't find any licensing information for Futallaby anywhere in its distribution; however, seeing as the code is instantly downloadable, i don't think they'll have a problem with me offering these changes.
if anyone's interested, feel free to email me.