Trying to understand the Bitcoin script walk-through

There is a script walk-through at the bitcoin wiki. It is not all that easy to understand, since it could be formatted and presented better. I show here the current table as it looks on the Wiki, and then further down my hopefully improved version. Here is what the original looks like:

Checking process:

So, in order to understand this, there are a couple of things that are kind of obscure in that table, namely:

• In the column "Stack" the top of the stack is the last item, which means that since the text wraps in the field, if there are multiple lines, the bottom-most item is at the top of the stack
• In the column "Script", it is actually the same script in all rows, just less and less of it.
• The comments seem to be written as to what the state is before the script part executes

It might be cleaner to do like this instead:

• Let the topmost item in the "Stack" cell in a row, be at the top of the stack, and number them.
• Only write the part of the script that is executed in a row. List entire script before the table for clarity
• Description should descibe what happens when the code in the row, operates on the stack in the row

Then it becomes like this:

Checking process:

Entire script is:

<sig> <pubKey> OP_DUP OP_HASH160 <pubKeyHash> OP_EQUALVERIFY OP_CHECKSIG