I just got the Pok3r yesterday and I haven't looked into the programming yet but there are 4 layers, default and programmable 2,3 and 4. I don't know yet whether you can program only FN + key combinations or actually you can also assign the keys to the layer without using the FN key but surely someone will pop in in a moment and set this straight. Meanwhile maybe it would be beneficial to get used to the regular control location if you are not using your HHKB anymore? I haven't seen many boards with HHBK layout. Also you could utilize the CapsLock as the Fn key which is very handy.