I have got a 300 gig external harddrive. all the drive has on it is the 43 gig of raw DV that has been converted to mpeg2. DVD program errors out with "not enough temporary storage in folder....geez just how much temp storage am I gonna need to burn 60 minutes of video??
DVD Architect is probably using your C:\ drive for it's temporary files. Look through the preferences and change the temp directory to your external drive.