Actually - you can use the paths tool in photoshop (pen tool set to paths). This allows you to fake the illustrator vector style- but Illustrator makes this quicker - but since you don't have illustrator use this tut:
http://www.elated.com/articles/paths-and-the-pen-tool/
It is a quick simple fix, oh and why can't you make it 14 by 9 feet in the first place and then .rar it?
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Greg