I didn't understand your question. Using fetchRemote to get an image from a website is the same as getting a file's content and using dxCreateTexture to load it, it will get the file's content everytime you call it. There's even an example in the wiki for that.
1st, it gets the image content, sends it to the client.
2nd, the client calls dxCreateTexture which then returns the texture from what you sent to it. It's then stored in a variable.
3rd, you call dxDrawImage with that variable.
If this is not what you wanted, I'd like you to explain it better.