Hi. I'm not 100% sure but i think, if you were to put the vampire baby bassinet on the lot, the human baby will be put there automatically as well.
Object making is not my area of competence, but if things work the same as with cas items, do it like this:
- under the Object button, there is an Overwrite option. Select it and click Object;
- find the vampire bassinet, select it, Next, name it vampire_bassinet;
- press Shift Ctrl C, copy-paste "studio.exportall". This will create a folder with everything needed ( i think) in it;
- Tools - Color palette, Import palette;
- go back to Object - Overwrite, select the regular bassinet, Next, select vampire_bassinet you've just created, it will ask you "do you want to overwrite it", say yes;
- Tools - Color palette, Apply Palette to Package;
- press Shift Ctrl C, copy-paste "studio.importall". This should import everything you previously exported
I've tried it and everything seemed to be replaced