How do I create new fantasy blocks or cubes with Forge?

I can't seem to create a fantasy block or a cube. I have tried reading the Forge user guide instructions in the wiki, but My fantasyblocks.txt is completely different. It doesn't have index numbers, so I cannot add another number to create a new line.
What my fantasyblocks.txt looks like: my fantasy blocks
Running Win7x64 if it matters.
When I try adding info, Forge locks up. I'm assuming since nobody else seems to have this problem, there is a new guide somewhere, but I just can't find it.
Can anybody point me to an up to date step by step walkthrough on how to create a fantasy block for sealed and draft play and a cube for sealed and draft play please?
Edit: I've seen the instructions at this thread, and I'm not understanding them. The example in the last post appears to be completely different from all previous instructions, and I don't see how it explains to create a fantasy block or cube.
What my fantasyblocks.txt looks like: my fantasy blocks
Running Win7x64 if it matters.
When I try adding info, Forge locks up. I'm assuming since nobody else seems to have this problem, there is a new guide somewhere, but I just can't find it.
Can anybody point me to an up to date step by step walkthrough on how to create a fantasy block for sealed and draft play and a cube for sealed and draft play please?
Edit: I've seen the instructions at this thread, and I'm not understanding them. The example in the last post appears to be completely different from all previous instructions, and I don't see how it explains to create a fantasy block or cube.