How can i use the ant tool to extract reports and dashboards from SFDC. Ant is installed on my system

HI ,

Please help me out.. I encountered this error while trying to installing Force.com IDE....



"

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 1967adb9098b0054385a2dd45fe0f5e3.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.core,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 44db36699ca7fdd38917fced4e63c3b3 and found 22fabfa35567ee6997134eb703785961.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.documentation,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 6d87eb2e76e7e19f7b709682e5272dfc and found 0eac517f8486c20194a93df06663f3f9.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.ui,24.0.0.201202291629.
MD5 hash is not as expected. Expected: 72451be89c0b7d5ca06b55c8ad657db6 and found 97c8723487e415b1d2e4f998a3496c94.
Problems downloading artifact: osgi.bundle,com.salesforce.ide.ui.editors,24.0.0.201202291629.
MD5 hash is not as expected. Expected: ff45a840737d9bef14347ce6f5b5daa4 and found 066475a759d26eb6818d08caf76f74fb.

"

Thanks 

Kavya

Hi All,

I want to know how to use Vsualforce to extend stanadrd object layout. For example, I want to add custom fields to contact object , and present these custom fields using Visualforce. I want to keep all the standard fields of contact as it is.Can I combine standard contact layout and Visualforce page? Any explanation on this is greatly appreciated.