flash animation

I am currently working on my flash animation for agent leaf, but I was also thinking different ways to animate this project. I was thinking if I create the the key frames in Photoshop then, flash it for in between key frames and import it into after effects for touch ups and finish it up in premier, I thought it would be a nice piece because Photoshop has more art design capability's, so I was wondering can I pull it off? Because I do not know if I can make the the out look consistent when I import it to flash? Like if i have to re draw some parts in the in between key frames I am not sure if I can have the same effects like I had in Photoshop? Hmm I guess its all trial and error, oh well ill figure it out somehow unless if their is some other software that is good to use like RETAS!PRO HD here is a link http://www.celsys.co.jp/en/products/retas/index.html I feel this is just an Asian version of adobe.