Here's another idea: since I can run Slayers disc, and therefore non-MS discs, then why not ignore the EvoX/UnleashX installations of Krayzie and instead get a CD image of something else which can be booted up then installed?
All I really want is XBMC and/or linux, so if that can be done using a bootable disc which will install itself 'over' Krayzie's EvoX/UnleashX (which is clearly where my problem lies.. the softmod obviously works since I can boot a non-MS disc, it's just the EvoX/UnleashX dash which is somehow buggered) with all the necessary files, thereby replacing the botched EvoX/UnleashX installation with something completely clean. How's that sound? Is it even possible? I don't really care what dashboard I use to get things running, all I want as an end product is XBMC, and in a perfect world, a way to run linux also so I can check emails etc and do the few things that XBMC can't do.
...but if we can continue with the above processes and fix Krayzie's installation then I might as well do that to begin with!