So if you have this issue, try downloading the O2_Platform v5.1.1 [with extra References].zip which is 23Mbs
and when unzipped locally, will contain a number of O2 dependencies in the main folder:
and a large number of dll assemblies used in multiple H2 Scripts, for example the WatiN’s dll:
Let me know if you have any issues with this download or H2 Scripts