Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In a small saucepan, bring vinegar and sugar to a boil. Boil for one minute.
In large bowl, combine vinegar mixture and both dressings. Mix well. Add pasta, cucumber, olives, tomato, onion, carrots and capsicum; toss. Season with celery salt, salt and pepper. Refrigerate until serving.