I would advice everyone to stay away from GAG/SBM, at least don't install it on the harddisk, straightly use floppy if you want.

Both said, "I don't touch your partition" and only the first track of the harddisk. The truth is, this is a no man's land and everyone wants to play with it(including grub, but that can be disabled).

The most obvious problem one will see is that if you have W2K/NT/XP installed and later trust this GAG/SBM stuff(and let it install to the harddisk thinking it is harmless), you can no longer boot any of the MS program as the NT boot loader also think that the first track is free to use, and put itself there, which got overwritten by GAG/SBM.