This patch will make so you can place Throw Block sprites directly in Lunar Magic, inserting using sprite command 53. With the extra bit set to 0, the block will spawn in the stationary state, if set to 1 it will spawn kicked towards Mario. Check out the asm file for a couple customization option (for example, make blocks never expire if placed directly in LM).
Note that you need to run a sprite tool (e.g. pixi) on your rom at least once in order for the extra bit to be properly handled.