You can upload your files directly to RHDN's Scratchpad service and receive URLs which you can then use directly use on the submission form.
Upload the following to The Scratchpad:
1.) The main archive file
2.) The readme file (if in text format)
3.) English Title screen screenshot image
4.) At least one regular screenshot, but 4 are preferred so people can see how great your work is. Statistically people ignore translations without screenshots. Screenshot policy for reference.
The submission form contains submission guidelines and help icons for most fields if you have any other questions:
Non-technical people sometimes have trouble with the ROM / ISO Information field. This field is necessary to identify the ROM so people know what your patch was designed for. You can just download snarfblam's ROM Hasher utility and copy and paste the output. It was made for exactly this purpose.
Please write-up as much relevant information as you can in the Description field about the project. (Example). You can use the 'Preview' button to preview how your entry will look.
I will do you a favor and stop by on Sunday the 22nd if you submit it early and everything looks good.