I am using the Win004CLIwithfix.rar downloaded directly from the bipcoin site as it is currently hosted. I extracted the files to a new folder on my hard drive. I can run bitcoind and simplewallet. However, the mining commands are now absent from the "help" menu.

In simplewallet:
start_mining [number of cores] responds with "unknown command: start_mining"
mining command responds with "unknown command: miner"

Same with bipcoind when I try the mining command there.