-You have to use a FAT16/FAT32 filesystem only if you consider using syslinux.
-Syslinux (currently) does not support any other filesystems. If you want to use
-another filesystem (like ext2/3) just don't use syslinux (drop the \--syslinux
-option) but use the default bootloader (grub) instead. Note that FAT32 is
-supported since syslinux version 3.0.
+Syslinux (currently) does not support any other filesystems besides FAT16/FAT32
+(though that's a sane default if you want to share your files with other
+(operating) systems). If you want to use a different filesystem (like ext2/3)
+use the bootloader grub instead using grml2usb's '--grub' option.
+
+[NOTE]
+FAT32 is supported since syslinux version 3.0.