So one can make any size cartridge with the same 410bytes boot loader ?
And does the new bootloader work ?
Anyway even if you have to double the directory, it shouldn't take that much space (say we have 200 entries, thats 1600bytes, with the bootloader it's less than 2KiB, that leaves 510KiB for each bank).
Speaking of banks, in the Handy cartridge file format there's support for bank0 and bank1, how is the lynx supposed to switch banks ?