Hello John,
You can use FM /TMWFLOW/MO_UI_BASKET_AUTHORIZ (SM37 tcode)
At I_OSS_RFC provide SAP-OSS.
For RFC connection SAP-OSS provide S-user which you downloaded files to approval.
http://howtosap.blogspot.com/2011/04/how-to-approve-support-packages-via.html
BR,
K.