hi.
first you need to select the pcitures you want to use from the gallery by checking the checkbox next to the title of the picture. Don't forget to click the "Add selected pictures to my picture list" button.
then go to the worksheet maker section (
http://www.eslhq.com/worksheets/) and click the 'Mini Flash Card Set' link and name your worksheet. then you will see all the pictures you just added to your list. select those pictures for your worksheet.
then after you have selected the pics you want to use, click "Make Worksheet".
I hope that helps. please let me know if you need further assistance.
Eric