Hi,
Neither CW Classic nor CW Eclipse supports P1020WLAN.
I suggest to use any board that has a P1020 processor (as far I know for CW 8.8 there is a P1020 Service Pack that you can install) and to select the SRAM cfg file instead the default core cfg file (this way because the core cfg file contains the DRAM board specific settings and I'm pretty sure that will not work with your WLAN board.)
Secondly, please update the stack and the heap address (from project properties) to fit in the SRAM area (you'll need this update if you need to make a download debug, if not just use the Connect target - Flash Programmer usage for example is enough).
Regards,
Marius