Win 32 system, XP OS. Using Eclipse Helios, Followed the following URL to do the very basic - install the eclipse plugin for Force.com, but no dice.  Here is the error at 47% everytime.  I don't see any resolution when i searched online.  Not sure if i am doing something wrong, or maybe the install documentation is incorrect, or may be an error in the installation package.  Pls. take a look and let me know what is going on.  Thanks.

An error occurred while collecting items to be installed
session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,com.salesforce.ide.api,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 7251ab037ae632a5a9835c7c07210451 and found 7fcf87fad05f91b6c00745869ba36929.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.core,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 44db36699ca7fdd38917fced4e63c3b3 and found 7c211598ddd92347f0671c339fda7ac6.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.documentation,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 6d87eb2e76e7e19f7b709682e5272dfc and found 25a4e7db6ebe25b7a3cbcfd8119d38f2.