WSP Istallation issue:-
The solution can not be deployed. Directory associated with feature <feature ID> in the solution is used by <feature ID> feature installed in the farm. All features must have unique directories to avoid overwriting files.
October 29th, 2010 7:01pm
Go to "c:\program files\common files\microsoft shared\web server extensions\12\template\features" and make sure directory with same name as feature doesn't already exist Microsoft Certified Master | SharePoint 2007 Blog
October 29th, 2010 10:51pm