Sorry for the delay, here is what I have so far:
I would start a new listing just to be safe.
You will need to save the codes from the links below in the correct areas.
TEMPLATE CODE - This would be saved under the custom template area.
SHIPPING/PAYMENT DETAILS Look for the link to shipping details under the custom template area.
DESCRIPTION - You would need to save this as a profile after you save your new ad. Do this last so that you can preview and make sure all is correct before you save.
I hope all this makes sense, I will check back in the morning to see how you are progressing. I know that there is a tutorial on how to work your custom template that may help you a bit as well
Custom Template Tutorial