External Uploading

[execute]

basically my idea is to insert into a client (non cpg) website via an iframe a page that is in my cpg site especially scripted for just uploading a file, upload it to a certain account owned by the client website to my cpg site by getting the parent frame's url. then display the url pointing to that uploaded page. by this, the client website's users can just copy paste the url and insert into their posts on the other website. I'm sure this can be done securely with the right javascript/php verifications.

this is particularly focused on those websites that allow posting of images but lack space. so they opt to just insert an image from a URL outside their site.

any ideas? I'm thinking of doing this myself but i couldn't fit it in my schedule to produce it quickly alone. if anyone would like to help me, i'd greatly appreciate it.