We tried to use 2.3.2-p1 version on Windows Server 2008 R2 Hyper-V, but this PFSense version does not recognize this virtualizer IDE virtual controller. We also tried some previous versions, but we also had some problems on PFSense installation.
What do you mean by "not recognize"?
Could you provide a screenshot?
And by the way, with 2008 server you should use only fixed size .VHD, not dynamic one.