Ok that JCM800 doesn't have a loop, so here's what I did:
Speaker out in Palmer PDI-09 and through to one side of the H&K 4x12
Palmer DI into Axe FX into ART SLA-2 into the other side of the H&K 4x12
I mixed a bit of dry in the Wet signal as it sounded better to me.
It feels great to have a one channel amp at your finger tips and totally transparent tone with FX!
Here's a small vid of the setup:
http://www.youtube.com/watch?v=S7ZRG_fSZwE