Getting a connection is the challenge.
I have some concerns about the techniques suggested, in particular the instructions on battery handling.
What happens when you open BlackBerry Desktop Manager and connect your powered up BlackBerry?
If it recognizes your PIN number, you are ready to proceed. If not, try the Detect connection button.
If that still does not connect, pull the battery and force a restart. While it is starting, watch for a brief connection. If you see you PIN for just a moment, do it again but be ready to click the Next button during that moment.
Don't give up, it will connect eventually.
While it doing it's thing, check out this thread at CrackBerry.