BTSD, also known as Blocktool Super Deluxe, is a block inserter which supports both .BIN and .ASM formats without crippling slowdown.
WARNING: Do not edit your ROM using any other tool (including Lunar Magic) while this tool is open. This is because BTSD doesn't reload the ROM, so if you edit it with other tool while using this tool, some stuff can get overridden.
Obsoleted by GPS. Backup if the tool is ever needed again, since after the blocks remoderation from the section they might not be compatible with BTSD anymore.