All the submission of forms and choices (e.g. summer school edition) will be made though the Student page. The login for the Student page is first your contact email and after the beginning of classes, it becomes your IMBRSea email account. You will also receive an email to set this password through your contact email before the classes start.
Student page: http://econsort.ugent.be/student_file.asp?ec=imbrsea