heh, depends on the skill of the developer

If someone has the skill to develop a breedable system, they should be able to cope with on-demand, it should pose no more challenge than lag. I'd love to see the approach your friend was using, I never fully finished my pets system.
..as to will they work here.. they will almost certainly need tweaking, there are minor differences between the two scripting systems, but for the most part they are
mostly compatible.
Scripts seem to be currently added to the forum scripts section (which will hopefully be separated into a script "questions or help" forum and a script "place here" forum)