PDF Architect is able to combine multiple file types into one PDF file all at once.
To do this click on the CREATE Module. Click on Merge Files.
The Merge Files window will open. To select which files you would like to combine together, choose the Add Files option. You can also add all the files in a given folder by choosing Add folder. You may now browse your computer and choose your files. You can also use the Add Opened Files option to choose between any PDF files currently open in PDF Architect. Repeat this process until all your files have been added to the list appearing in the empty space below File Name.
Once the files are listed in the box in the middle of the window, you may use the up and down arrows to rearrange the order of the documents. The order they appear in this window will be the order they are combined as a PDF. You can delete one or all files from the list with the Delete options. You can also specify the page range within a file you would to extract while combining your files.
When you are ready to combine your files click on Merge.
When the combining process is completed your new file will open.