This is the deal, I finally decided to make the giant leap from Windows to Linux so I installed Mandrake 9.2 along with windows. All of the installation process was ok. The problems came when I decided to install more packages that come with the cd. For some reason I cannot install the other packages or any package because of "Bad signature". Here is the message that I get
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[X]
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The following packages have bad signatures:

lbbreakout2-2.4.1-3mdk.i586.rpm: Missing signature(Could not read lead bytes)
libSDL_mixer1.2-1.2.5-3mdk.i586.rpm: Missing signature(Could not read lead bytes)
tuxrace-0.61-15mdk.i586.rpm: Missing signature(Could not read lead bytes)

Do you want to continue installation?

[ YES ] [ No ]
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Please. I totally new to Linux so I will need clear instructions on how to solve this problem. thank you.

If you say 'yes' they will install. The bad signature message is because you don't have the GPG signatures for the packages on your system. 2 choices - ignore them, or go and get the GPG signature from Mandrake (probably) and then install.

Even if I click "Yes" it will tell me that the RPM packages could not be installed.

Someone Please Help me.!!!

"could not read lead bytes" could mean a corrupted download. Have you tried redownloading and trying again?

Looking again, all those games should be available via urpmi. just type in 'urpmi tuxrace' and it will download and install for you. Makesure your urpmi sources are set up - go to plf.zarb.org and go to the source update section. Follow the instructions and use.