well i have an older style iframe with the latest cricket board in it and it works SWEEEEEEEET!
think the prob was to do with the mounting of the small speaker/beeper thingie on the board stopping the board fitting into the iframe....simple solution....find somone who is confident at soldering, take off the beeper thingie and put it onto a pair of short leads and bung it into the battery space, plenty of room and works fine
mine was done when i got it so im guessing this is the case, haveing looked at mine....ask paul collier as im sure it was him that eather did mine or will know who did it for him, could have been nick t of nexus as it was his marker once too