Convert animated gif to Flash MPU

I produce animated web banners in photoshop and supply them to my client as GIFs. Once the design and the proposed animation are signed off, (in a few days time) two of these banners (currently 300 x 250 pixels but this could change) need converting to a Flash MPU (mid page unit - I believe) I have advert format guidelines in MSWord (uploaded) but I repeat these sizes are liable to change. I understand that they are standard IAB guidelines but because I don't know flash I don't know what that means! Maximum file size will probably need to be less than or equal to 30kb. That was the case in 2009. I will be able to provide graphic elements in vector EPS format where possible and as layered photoshop where the elements are bitmap. A colleague used to do this for me at my previous place of work and each MPU took him about an hour to produce. I've used this factor to set the budget.