7- zip help

[kickout1434]

I want to get the what is known as ultra compression using 7 zip...i found a game file on the web which was actually 142 MB but was compressed to 8 MB and was working too...i heard a rumor that experts have hidden the secret behind this....what should be the setting for this ultra compression...i dont want to use KGB coz it doesnt qualify my system
My System config
intel core 2 duo
1.5 GB Ram8)

[Disc_Junkie]

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