I did some tests with the Newton wrapper and A8.

The changes to get it to run are not so difficult and quickly done.

1.) open newton_main.c
2.) drop the _VERTEX_ struct and whenever it is used in the code, use D3DVERTEX instead.
3.) in your main script, currently you need to use #define A8 before including acknex.h. This won't be necessary with future A8 releases

4.) if you remove the #define A8 from your code, it should work with A7 again.

Have fun