word up! GOOD NEWS: well, you don't have to buy Military Madness because....
you get the Nectaris HuCard ROM as a BONUS with NEO NECTARIS. It's called "NECTARIS1" on the menu screen. You don't have to unlock it, it is always available.
Of course, it's the Japanese version... so there's very little English. But it plays identical to the HuCard (the console boots up the ROM from the CD drive instead of the card slot).
If you can get the Military Madness HuCard cheap, go for it. Otherwise, enjoy the Japanese version! You really aren't missing much, since there is minimal storyline
(read all about it here). Plus, you can view the TG-16 instruction manual on my site as well.