I'm sorry, I said Shift-select.  What I meant to say is this:

• Select one edge on the border you want to select.
• Hold down ALT on the keyboard to add to your selection.
• While holding down ALT, press and hold down SHIFT, then select the next edge in the loop.
• This will select the entire loop of edges (as if you were in loop mode) until it reaches a terminator edge.

From that point, if you don't have the entire border edge you need,  repeat the process by holding down ALT again to add to that selection, and do the same with SHIFT, until you have the entire border selected.  SHouldn't have taken more than 10 min by the look of that model? 

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