b2, you can resize right in your Pictures.

Click on "Your Pictures".

Click on the image you have saved.

Go to FILE then down to EDIT

Then go to IMAGE

Go down to the STRETCH/SKEW

Change the numbers in those 2 boxes to approximate size you want. You can play with the numbers again and again until you get what you want. Each new image size will be 100% so you have to go from there.

Don't forget to "Save As" when your done. Just replace new size with same name. That means click on "YES".

You can then just "BROWSE" to get the image in your CP.

You may not need to host it.