Start by enabling "Mass Storage Mode Support" (assuming the pics are stored on your card, and not device memory). Goto Options -> Memory to do this.
Plug your phone into your PC and you should (depending on PC OS) get Autoplay pop-ups for "Blackberry2" & "Blackberry1". For me, Blackberry2 is the memory card in my Storm. Treat it like you would any other folder on your computer, using explorer... navigate to the pictures folder and copy away.
Posted from my CrackBerry at wapforums.crackberry.com Download the Desktop Manager and use the Media loader to load your files to the media card or internal storage.
Posted from my CrackBerry at wapforums.crackberry.com