Yep, You can skip P1..... Cumulative.. See the section below from the Patch 2 Readme. I see no restrictions where SP1 is required first although there are some interesting issues mentioned in the Readme. :
This release was developed for use with: VirusScan Enterprise: 8.7i Detection Definitions (DAT): 5700.0000 Scan Engine: 5.3.01 Make sure you have installed the correct version of the product(s) in this list before using this release.
Installation Instructions To use this release, you must have VirusScan Enterprise 8.7i software installed on the computer you intend to update with this release. This release does not work with earlier versions of VirusScan software. A reboot is needed to fully load the system drivers into memory. The package installation does not force the reboot.