resize pictures

I need a little help on this one, the user needs to be able to select a folder (got that taken care of) and the folder will contain a bunch of .jpg files. The program than needs to resize the images to 200x100 and save the resized image into /resized1 and then it needs to resize the original files again to 500x1000 and save those resized images into /reized2 and finally delete the original .jpg images in the root folder

thanks

Dimava