HTTP Compression - MIME GZip header

Following up on the thread http://www.wmusers.com/forum/showthread.php?t=14325&highlight=compression… can someone detail the necessary steps/settings that has to be done on IS for HTTP compression.

Had a look at Admin, Dev, WS & Soap guides… but nothing has helped me.
I’m using version 7.1.2.

Cheers,
Jim