If you want to know if IE6-SP1 is installed, open IE, select Help, and About. It should have SP1 under Update Versions if it's installed. I don't know why you have it three times, but SP1 takes some time to install and it should be obvious that something going on. It's also about 10mb or so download after you get the initial "starter".
If you look into Add/Remove Programs, you should find Microsoft Internet Explorer 6 SP1 in the list if it's installed.
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