Thanks for choosing WinpkFilter. Actually 64 bit version of WinpkFilter driver is ready and we are running last series of tests with it. I hope it will be released in a week or two.
Few notes regarding new driver. Because of new Microsoft patching policy for 64 bit Windows (http://www.microsoft.com/whdc/driver/kernel/64bitpatching.mspx) we created 64 bit version using NDIS intermediate driver as a base (instead NDIS-hooking one), however new driver exports same API’s and internally shares the common code (folder COMMON) with VxD and NDIS hooking 32 bit NT driver, so there should not be a problem to move your existing code to this new environment. The NDIS IM installation issue (unsigned driver installations warnings) can be easily resolved by run-time changing security policy, installing driver and restoring policy (it works well on the modern 64 bit systems).