Converting a router board 751g-2HnD to become a switch

Iv had this device for a while and am wondering how one would convert this router to a switch from its default configuration.

I have disabled dhcp/ all nat/ wireless/ firewall rules/ and cant seem to make it act as a switch any one been able to do this?

Here are two ways:

Hardware:
http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features#Port_Switching

Software:
http://wiki.mikrotik.com/wiki/Bridge#Example
http://wiki.mikrotik.com/wiki/Bridge#Example_2

thanks works great.