I'm using a non-DNN page referenced in an iFrame module to create a mini-store page within my DNN site.  (I'm doing this to get around the form tag and multiple paypal website standard button issues within DNN)  The page works great, however, when users click Continue Shopping from the Paypal new window, they are returned to the store page within a new window, but not within DNN.

Example: 

Main DNN site is at www.site.com/dnn

Users accesses a store page within DNN at www.site.com/dnn/store.aspx

Paypal Store Page built outside of DNN at www.site.com/store but referenced within the iframe module on www.site.com/dnn/store.aspx

Once users access paypal, they are returned to www.site.com/store and I now have that window opened as a stand alone and I also have the main DNN site open as well.

Firefox correctly closes the window, which is effect all I want to happen from the paypal page. IE is the issue leaving two browser windows open.

Suggesstions?