Complex sentence: ATI Technologies became the main sponsor of the event, and apart from the lucrative prizes, offered various other features to the party, such as seminars and workshops, and also sponsoring a helicopter flight for willing visitors over the hills of the Rhine-region.
Split into simpler sentences: ATI Technologies became the main sponsor of the event, and apart from the lucrative prizes, offered various other features to the party, such as seminars and workshops. Also, ATI was sponsoring a helicopter flight for willing visitors over the hills of the Rhine-region.