Board Thread:Questions and Answers/@comment-25139420-20140712130557/@comment-76.238.194.159-20140801012403

You can edit bottom-screen sprites by hacking CHRED around line 20-30 and change the BGU, SPU, or BGF to SPS, and the number right after to 2, the BF/SP to SP, and BOOM. You can edit lower screen sprite and save same as usual. HOWEVER, to load and use usually requires SPPAGE 1 before loading SPS#:filename. Either way, that is how you can edit and use the SPS sprites.