Apologies for the slightly inflammatory topic title but I'm really at the end of my tether with this little beastie. I'd appreciate any help or advice anyone might be able to give me on this (or if anyone's had a similar problem).
I recently bought a Joggler from ebay. As far as I can tell the hardware is normal and it did come with SqueezePlay installed by the seller (who I think might actually be a member of this forum). However, I wanted to install roobarb!'s SqueezePlayOS to the internal memory so that it would boot straight into the SqueezePlay application as this would be the solution with the highest Wife Acceptance Factor

Unfortunately I just couldn't get any images to boot from USB stick (as described in this post), it does exactly the same thing for all images I've tried (Ubuntu, Xubuntu, JoliOS, SqueezePlayOS, even the reflash tool) :- gets to the bootloader and then just hangs with no output. I tried the changes which were helpfully suggested by roobarb! sadly to no avail.
The only USB image which does seem to boot reliably is the latest official OpenPeak firmware image linked to from this post which I installed in an attempt to see if that would improve matters.
Unfortunately on my second installation of the OpenPeak image it no longer seems to boot from the internal memory either and just sits at the "OpenPeak" logo bootscreen forever (although it will still boot from the OpenPeak firmware USB stick and optimistically tells me that it is "Ready!").
Have I inadvertently bricked my new toy? Has anyone else seen behaviour like this before (failing to boot the kernel after getting through the bootloader)? Help!?!?

Any and all suggestions, comments or commiserations gladly received.
Cheers
Simon