How to draw top part of TomTom Go730?

Hi,

I have to draw Tom Tom Go 730 in school. Everything is perfect except I'm unable to draw to part of it. There is too many curves and my knowledge of SW is too small.

http://www.clicknavigatori.net/UserFiles/Image/Navigatori/tomtom_go630.jpg here is good example of it. I uploaded my project. Hope it will help somehow.

BTW. is there chance to convert all sizes of whole project by 50%, instead by changing everything step by step ?

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