Hi,
To customize Webview reports or add new reports to the existing ones you will need to purchase Sybase Informaker.
Take a look to this links:
http://www.cisco.com/en/US/products/sw/custcosw/ps4145/products_user_guide_list.html
The three last links (WebView Template Reference Guide for Cisco Unified CC Enterprise & Hosted, Release 7.X.X)have the reference guides to create new reports or modify the existing reports in Webview using Infomaker.
Hope this helps,
Juan Luis