Long filenames on GBA

Hi, i've just found this place so apologies in advance if this is covered somewhere, had a good look around and couldn't see it anywhere.

I've been borrowing a friends GBA flash cart for a while now and i'm hooked, so i'm getting one myself. Plus i think he wants his back... :D

The one thing i didn't like about his was all the filenames showing in the old 8.3 short name format. There doesn't seem to be many pics up of the menus for the different carts, so i'm hoping one of you good people can point me at a decent GBA cart that supports long filenames.

If it helps i guess i could put it another way. Are the short filenames in the menu some sort of limitation of the platform or just lazy programming? I've seen screenshots of NDS flash cart menus with full names but not for GBA.