You'll need to remove the fast file system from the RDB if present and upload the pfs3_aio-handler in its place (located in L: now).
It is a nice tutorial you give here paul1981, but why do you recommend that FastFileSystem is removed before adding PFS3-AIO? I have never had any problems with having both on my harddisks.
For those who don't use ClassicWB, the LargeHD drawer + PFS3-AIO can also be found here:
https://app.box.com/s/xfby0lqm25bfsn2xusoa
