I just had the same issue. Installed EPO 5.0 on a VM, checked in VirusScan 8.8 and was flumoxed by not seeing any of the policies. The correct extensions aren't exactly easy to identify either.
Under your available downloads, go to Virus Scan 8.8, and go to the Patches tab. Find and download the VIRUSSCAN8800(348).zip for the management extensions, and the VIRUSSCANREPORTS210(22).zip for the report extensions.
Hope this helps!