I will be adding more information as SpoutMaterials support is tested.
The new version is called MoreMaterials and hasn't been tested yet (it does contain support for the old SpoutMaterials config but I'm not sure if it handles the items the same way).
Custom SpoutMaterial blocks/items are represented by FLINT@<id#> starting with ID#1024.
Eg. the first item in your config is FLINT@1024, the second FLINT@1025, etc.
You can use them as the block, tool or even drops, eg:
FLINT@1024: - tool: FLINT@1025 drop: FLINT@1026