Exported from DWG viewer to a .PDF file (IIRC photoshop can import pdf - At least CS5 which I have does !) - Not sure if it exported to proper dimensions so you will need to verify the sizes once you get it into photoshop using the ruler tool.
IF for some reason yours does not have pdf import - let me know what size the side panel is (ie. height and width at largest point and or size of the CP boards) so That I can verify the dimensions and import it to CS5 and save in PSD, png or jpg format for you (let me know what format you want it in.)
I opened it in CS5 and the default size shown is 7.043 inches x 6.045 inches but it can be resized to any size for import - just need to know what size you need it.