. . . because DWG files are NOT listed under OPTIONS > FORMAT.
This appears to be the case, given my experience thus far with the 0.9.9 release or version of PDFCreator.
Under FORMAT, I find only the following formats: PDF, PNG, JPEG, BMP, PCX, TIFF, PS, EPS, TXT, PSD, PCL, Raw, and SVG.
To me, this strongly suggests that members reporting their ability to convert an AutoCAD DWG file to PDF are either lying or have manipulated the program in some manner that does NOT exist in the download version from this website.
I am willing to be wrong here, but since I cannot find any proof to the contrary and support from those whom solicit my PayPal Donation appears non-existent, I can only assume that I am correct on this issue.
T4USD