The general logic behind these is heavily based off magmapeach's Cave Story autosplitter.
gnazo - character get.asl and gnazo - room change.asl support gnazo versions 1.00 and 1.01. The former splits upon character get and the latter splits upon loading the next room after beating a boss.
kd2.asl supports versions 1.02 and 1.02a. The SplitRemilia option doesn't work very well and might reset your splits.
To my knowledge, there should only be one version of the game out there. Splits on teleport.
rks.asl supports versions 1.05c and 1.06a of the non-Steam release as well as version 2.02c of the Steam release.
rksf.asl supports version 1.04a of the non-Steam release and version 2.03b of the Steam release.
Both of them split on teleport after beating a boss.