You need to flash the PDA, and if you have them in the package, PHONE and CSC as well, otherwise it won't work. The instructions are in the thread I linked. Just flashing a kernel won't fix it.
Thanks very much for all your help. Im back on now with a stock rom... gonna leave it as is for a few days and then maybe try my luck again now i know how to fix it should it go pear-shaped.
Once again, many thanks!


I'll post the link if anyone has the same problem