1) Please wait for 5 to 10 seconds. A new menu with name "Mass Image Uploader" will appear in Add-Ons menu of the Google Spreadsheet. Through this menu you can upload multiple images.
2) Please click the menu and then click the "Upload Images".
3) A dialogue box will open. Select your images, enter the row number and column name.
4) Please select orientation of the image placement.
5) Please select the size of image you want to place in the sheet.
6) This add-on will start placing images.
7) Please take extra care while entering row number and column name, it may over-write your data.
8) Click on Upload Image(s) button to upload bulk images.

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