I would like to see command line options added. They would allow for interactive choice of SOURCE and TARGET files. For example, if you issue this command: PDFcombine.exe *Browse* NewFile.pdf it would allow you to choose source file(s) with the GUI interface (a smaller interface would be fine). I would also like to see Destination allowed for interactive choice, for example: PDFcombine C:\Users\Public\Documents\*.pdf *Browse* would add the stated source files to a hand chosen existing PDF file. These seem easy and natural to do but if it would be easier or more sellable, I would settle for registering PDFcombine to be a right-click option in Windows Explorer.