Grrr Flash 3.0

oh my god how difficult is it to go from flash CS2 to CS3! its doing my head in i knew the basics in CS2 enough to do what i needed and now i wish i didnt know any at all. the slight bits i did no in CS2 are now really confusing me with CS3 so i think im just going to start again so im going to get a a book and by the end of christmas i will be CS3 guru!