Import window uncheck all by default

Hello,

I wish for the Import window in Aperture to always have all files UNCHECKED by default.

Many times has the import process been started when I simply selected (not checked) a series of files and when i realize my mistake it has already imported and renamed a huge amount of images that I then need to almost individually address one by one... It's extremelly time consuming, it would be so much simpler if it was like Image Capture that you have to select something before importing, and you simply don't import if nothing was selected.

PLEASE help me find a box to check, a setting to change or a script I can run, anything that makes all files uncheck by default when importing.

Thank you very much.

André