You need to do 4 banners.
[login to view URL] SWF in size750x100 pixel and on this basis jpg or gif. size max 50 kb.
[login to view URL] 120x600 pixel in SWF and? on this basis jpg or gif. size max 50 kb.
For all you can use similar idea for advert.
Before accept the bid you need to send me a screen for banners.
Please send your portfolio for banners or link.