The collision array only has these entries, according to Nemesis' guide: So how do I use EHZ's collision index in level 01?
I got a hit for $044E50 at 0x49E8. That seems to be an array of collision index locations. If you wanted to change level 01's collision index to EHZ's, you would merely change the 4 bytes at 0x49EC from $045A80 to $044E50.