if anyone else wishes to know
ibex with virtual box 2.0.6 from sun will install pcbsd from dvd using the pcbsd 7 dvd there is a bug in the video for kde to get in @ present hit 7 (to reselect x) when pcbsd starts choose 800 x 600, 16 colours and vesa driver and voila you get into kde
this worked for me by trial and error after several several attempts with other resolutions this one finally worked :-)
i would put this on the virtual box forum but currently it consistently times out on me and i get a page load error
****after updating pcbsd i can now use 1024 x 768 with 16 colours