Dell 8600: Problem installing Omega drivers

Hi,

Encountered a problem with installing the new Omega drivers v.2.5.76 on my i8600 notebook. After downloading, I am not able to run/extract the files (using 7-zip) and there was a message that says "Archive not supported". This is my first time trying out Omega drivers.

Any help/suggestion appreciated

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Dell Inspiron 8600
Intel Pentium M 755 2.0 GHz
15"4' WUXGA Ultra Sharp Screen (1920x1200)
60GB Ultra ATA 7200RPM Performance HD
128MB DDR ATI Mobility Radeon 9600 Pro Turbo
1024MB 333Mhz PC2700 DDR SDRAM
Running Windows XP Home Edition