As I reported here 2 weeks back, Trend Micro have today released a standalone Service Pack 2 for all WFBS 6.0 installations. This download is smaller (148MB) as it only contains the code needed to bring WFBS 6.0 up to the Service Pack 2 levels.
If you need to install the entire product on a new system then you will need to get it here which is a 600MB+ download
I will say that I’ve found this service pack to be the most stable set of patches from a vendor in a long time. I’ve also found that it has improved the reliability of our Trend installations greatly.