OS Commerce Easy Populate

Can anyone help me set up Easy Populate on oscommerce ? I have a txt file, saved from excel. It has ID, Author, ISBN, Pubn, Synopsis, Price, Category + Imag Ref fields in it. 1. The image ref fields have not yet been appended with the .jpg extension 2. The Fields dont match the database fields. 3. The Extra Fields are not in the database. 4. The categories in the txt file are Numbers - whereas the categories in the database are Names - ie I have named them all before getting the files and finding they are numbered. I would like the Easy Populate file on oscommerce to be amended to take all of this into account - The file I have is one of many so it is important that the change to the easy populate file is permanent and not just a job of getting my file in the database. Please read spec above, please try to avoid 'stock' replies. I have set this job as a small job - because I think that if someone is fully conversant with Easy Populate - then it wont take long. If I am wrong with this assessment - please feel free to bid for the amount you feel it is worth.