Uploading 1200 products to the Magento Backend

Hi Everyone, I have a website called [login to view URL] and I need someone to help in entering a data of 1200 products. I have entered myself 208 products, however, I would like to enter 1200 products more. Please note the following : 1) I am using Magento community as a back end. It is very important to be little bit familiar with this platform. You can youtube how to add product to a Magento to have an idea. There are scripting methods, however unless you are not expert please I do not want my backend to be harmed. 2) I would like to have error free results 3) All the pictures are available on the front end of the website that that you are going to collect the data from. I do not have them in my folder but I can collect them for you if this is your requirement. Please let me know in the response that you would like me to to give you all the pictures because then I have to decide weather I will do it or not 4) Please let me know in your response if you are going to use scripting or if you need me to install a specific extension in order to do this. 5) Please let me know in your response how many days will you forecast to achieve this task. 6) Please note that some products has more than one picture, hence you need to save all the pictures from the front end website and then upload them into the Magento backend server. 7) While you are uploading the products, some of them will be pre-order, some of them will have different colors, etc. You need to make sure that you are selecting the right attributes. Do not worry, you do not have technically to do any configuration, everything is setup. You just need to ender the data and select the correct attribute and correct price. 8) I will provide you with the complete excel sheets that need to be entered, however, please note that the MSRP Price is not available in the Excel sheet but it is available in the front store website that I am going to provide you. 9) in the Excel sheet, there will be the item number, what you will do to get the picture is to go to the front end side and enter the item number in the search, you will then see the image of the product with the price I have entered the data you see in the website by myself, but I do not have the time to add 1200 more products and that's why I am posting this as project. Hopefully all the above points are clear Thanks indeed