MQX distribution offers project stationeries only for supported boards. Your MQX release supports only boards listed.
If you want to use MQX on different platform/board you have to create your own BSP.
MCF52254 processor is almost the same as MCF52259. So the simplest way for you is to modify one of existing M52259 BSPs to reflect your board settings. (gpio_init.c; <board_name>.h ...)
PetrL