I haven't tried out the new database stuff yet, but when you make a resource page, somewhere it should give you access to the page with options only you have the ability to use, being the one to upload it, and there should probably be somewhere you can upload the file.
This is just a guess though. Never have, unlikey to use the system.
OFFTOPIC:
Is it possible to delete your own submission? If it is, I want to check out how the system works real quick, so could someone let me know?