The latest firmware for Gideon's Logic devices, the Ultimate 64 (firmware 1.41+), Ultimate-II+ and Ultimate-II  (firmware 3.10+) now supports the GMod2 cartridge format, which includes saving the data to cartridge flash. Freaky Fish DX Ultimate Edition now includes a crt file that supports this format in the zip file. Download the file from your purchase page to get the updated zip file.