Tuna, you can use the magic addon to link to vwar and it dont matter where you have the folder. If you try it and have any problems using magic let me know.
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Download Magid here]
Put the folder "magic" in your modules folder and edit the index file in it to set the path to your vwar folder. Go to admin and activate the module magic. That's it!
BTW your error there is a chmod related one.