I finally plucked up the courage to set the memory partition using SUroot's special dGB table and *poof* it just hangs on the white screen with green HTC. I can get it into the recovery page but I don't know what I can do if anything from there. I was having the usual problem of 10 tabs open explaining what to do but none of them actually explaining how to do it instead just linking you to more and more pages. After a couple of abortive tries with Android Flasher I realised that I might be on the wrong screen (the first one) so I selected FASTBOOT USB and ran AF and chose the bravo_alphaspl_dGB60 image. This time my phone's screen went black for a fraction of a second and AF went... ... but it stayed like this for about 5 minutes so I rebooted manually.