NeoHomeBrew (./9) :
Seems that if I want to be sure that shrinking works also on systems with regular SNK bios, I have to set all unused tiles
of the shinked sprites to transparent and deactivate autoanimation. DATlib provides a function to manipulate SCB1 data
with "SC1Put(addr, size, pal, data);". Would it be possible to do it with this funtion, HPMAN? If yes, could you please post a sample code for: sprite no. 150 / tile 1 to 6 are used / tile 7 to 32 are unused?

Just load a dummy blank 16*512 sprite beforehand I guess?

That's going to be an issue in pooled mode tho.