After removing Power CMS and folders as your instructions from another post this week and then installing it again from our newly purchased Design Extender I can now edit the cms areas in DW so the problem mentioned above is solved. It looked as though it could have been related to a missing file called PCMS_Edit_ContentID_1_Temp.php
Anyway the new Power CMS installation went smoothly and progressed exactly as the instructions. I now know the first installation from the standalone Power CMC Builder didnt progess properly as it kept stopping and I had to restart parts of it.
One final question though, I dont see the page where the pencil icon is next to the presets as described in this recent forum post showthread.php?t=29281
I dont have Data Bridge but do have HTML editor from Super Suite.
How can I get to see this for modifying the styling tab?