MAGMI (.csv) EXPERT - URGENT

I have couple of files with following data values and I want someone to make me a MAGMI compatible file and/or Magento attributes which can read the following values as filters: BRANDS COLOR WARRANTY ALSO: I want to add configurable products like - If a clothing item is available in different colors and sizes. Or if an electronic item is available in different specs like RAM, ROM, HDD, SCREEN-RESOLUTION etc. There should be a dropdown menu in each product with corresponding options. I have one file that is working fine. But it is not giving dropdown menu. I don't know why.