I hope I can properly explain this so I can get a straight answer...
Is there an equivalent to "My Computer" or "Macintosh HD" on the BlackBerry? Like is there somewhere on my CrackBerry that I can view the contents of the file system on both the device and my Media Card? If so is there a way to link that to my Home or App screen? Post a response here or e-mail/PIN the CrackBerry. Both are above.
Do be warned there are a few files you shouldn't move or rename as it will cause the hourglass of death and or wreck your BB to the point of needing to do an OS Reset.