Not directly. If you have a picture file it is most likely of type ".jpg" or ".jpeg" (often called a "jay-peg file"). You cannot attach this type of file directly to a Filing in eCabinet. You will need to convert the .jpg file into a .pdf file.
One way to do this might be to: open a new Word document, type in what the picture is, then insert the .jpg file ("Insert", then "Picture") into the Word document and save the Word document as type .pdf (in Word 2007). There are other software products on the market (e.g., Adobe Acrobat Standard or Pro) that can convert a .jpg to a .pdf. If you scan the picture, your scanner may be able to save the image as a .pdf.