Download Adobe Illustrator CS3 Trial from:
(registration needed)
http://www.adobe.com/go/tryillustrator
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Install and run
Run keygen.exe (Russian) to generate valid serialnumber
Enter serialnumber
Choose "Other activation options"
Choose "Over the telephone"
Run adobe-keygen.exe (X-FORCE)
Copy and paste Activation Number from Illustrator into "Request Code:"-field
Press "Generate Activation"-button
Copy code from "Authorization Code:"-field
Paste it into Illustrator's Authorization Code field and press Activate
Done

(tested succesfully on any Illustrator CS3)