This reply by tachyon in that Code Catacombs thread should give you the clue you want (i.e. put your whole command line in quotes, just like you did in your question). There might be issues you need to adapt to, like getting backslashes right, etc -- you should just try things out, and if they don't work, post the code that doesn't work.

BTW, why did you give us an off-site link to a PM thread? Please read the PerlMonks FAQ about how to link to PM nodes (it's really easy to do, and it's better for all concerned).