How to use 4.9 content in 4.8

Hey Guys 'n Girls,

currently converting our little game from 4.8 to 4.9 is not possible due to several show stoppers in 4.9.
So we are doomed to stay with 4.8 until these issues are fixed. But we would really like to use the Infinity Blade content in our game. Is this possible?

I already tried to add the content to a 4.9 project and copied it to our project afterwards (only tried with a static mesh). But Editor didn’t see it.

Thanks for your help!