Might as well just watch part 2. The story is that the first was pulled from theaters due to a whiny "moms against fun" type of group and they wanted to re-release it. They shot an intro and interstitials and re-edited the original but had enough new content that they just called it part 2.
So essentially part 2 is almost the entirety of part 1 plus eyebrow acting, garbage day, and stunts.