Add the correct category -- example: [[Category:Custom Art - Critters]]
Copy the direct download link from the FRM's wiki page. Depending on your browser, right-click and:
Mozilla Firefox: select "Copy Link Location"
Mozilla Firefox 3.6.15
Internet Explorer: select "Copy Shortcut"
Internet Explorer 7
Google Chrome: select "Copy Link Address"
Google Chrome 10.0
Last but not least, edit the wiki article corresponding to the category of custom art you are uploading. At the very bottom of the article, insert a table entry for the FRM, as shown here:
-> BEGIN TABLE W/ HEADER *IMPORTANT*
/*
Artist who made the FRM
The nomenclature of the art set
Mods (if any) that feature this art
File format of the art, only FRM for now
Description of the artwork; what is it?
Up to 10 images of the FRMs
...
Up to 10 corresponding download links
HTTP Direct download link(s), see above
If an archive exists for large sets
*/
-> END TABLE HERE *IMPORTANT*