“My Blackberry won’t show up on my PC Explorer as a drive.”

Chances are that this option is just disabled. You can check by going to Options then Memory. Make sure that Mass Storage Mode Support is set to “On” and Auto Enable Mass Storage Mode When Connected is set to Prompt or Yes. If for some reason these options are enabled then we may need to have a follow up question and answer. Let us know if this works for you in the comments.