No Dale, you can't change the name once you've uploaded as Konica Minolta Users. If you look at the comment you've left here, you can see that that's also under "Konica Minolta Users" for the same reason, i.e. you're still logged in to the KM Users challenge account. You need to out of that account before attempting to upload to the STF Challenges.
1. While in one of the the Konica Minolta Challenge galleries, click "logout".
2. Verify that the link word has changed to read "login". That's what tells you that you have successfully logged out. If it still reads "logout", then click it again until it changes.
3. Go to the STF gallery to which you wish to upload, and verify that "login" is showing at the top right of the screen. It needs to stay that way, because you don't actually log in to the STF challenges, so do not click "login" again. Uploading is done with only a password required.
4. Click "edit this gallery", and enter the password "stfpost". That's all.
5. Remember that you must have cookies enabled (and retained), and you can only do follow-up edits from the same computer used for the upload.