Firstly, it seems impossible to contact the developer, post your contact man :P.
Second, this thread won't look as a 'Bug' or a 'Feature request', but I had to choose a category and it seems that this is the only way to have a contact with the developer. So let's start it.
Starting with something that I guess the developer shouldn't worry, but someone may know and help me. It seems CrabEmu doesn't run in any Dreamcast emulator to date. Then I tested burning a disc, but did some error while attaching an ip.bin and it didn't work on the actual machine. Now I am 'almost' sure everything is correct, but as it does not run in the emulators, I am afraid of wasting another disc. So just to confirm, am I doing something wrong and it does run on the emulators or I can burn and it will work fine?
Now I have some doubts, does CrabEmu support these things:
-Folder navigation (separate roms into different folders)
-Recognition and uncompression of zip files (i.e. can I store roms in zip files?)
-Files with a not known rom extension (.sms, .nes etc)
For the first two, if the answer is no, then there are 2 feature requests.