May i know the steps how to install workbench on my desktop from the URL.
The process depends on what release level you are running. For 9.1 (and probably for 8.0 but we never ran at that level), from the Dashboard you select Open / Administration / Open Workbench on Desktop. This will create an icon on your desktop. The Knowledge Base document at http://support.openview.hp.com/selfsolve/document/KM204043?searchIdentifier=-141e7df1%3a137de804165%3a234b&resultType=document&documentURL=KM204043&resultsURL=%2fselfsolve%2fdocuments&allowReturn=true explains how to set up separate icons for multiple PPM instances.