Your going to need web hosting for this. If you don't already have web hosting just google free web hosting,(x10,000webhost).
I Created a Php File called image.php
Code:
<?
$id = $_GET['id'];
$image = 'http://www.website.com/rotmgimage/img/'.$id.'.png';
$photo = file_get_contents($image);
ob_start();
header("Content-type: image/png");
print($photo);
ob_end_flush();
?>
Now Save that as image.php, Even though you can name it whatever you want.php
Now heres an example of how that is going to work.
Say you uploaded a file called 1337.png to the /img/ directory.
If you went to
http://www.website.com/rotmgimage/image.php?id=1337
It would load 1337.png
----
Which is pretty much the same function as
http://realmofthemadgod.appspo*****m/picture/get?id=
----
So now for the change of the server file part.
Go to /db/data/ and open Xmldatas.cs
Change
http://realmofthemadgod.appspo*****m/picture/get?id= to
http://www.website.com/rotmgimage/image.php?id=
Then go to /server/picture/ and open get.cs
Change the same thing as before.
Now your pretty much set on the texture grabbing.
If you don't know how to use remote textures for your server, Pretty much just replace:
<Texture>
<File>lofiObj5</File>
<Index>0x70</Index>
</Texture>
WITH
<RemoteTexture>
<Id>draw:5252346121</Id>
</RemoteTexture>
-----
The Advantage to this is not having to manually edit the swf file and you don't have to use Rotmg's server for editing.
You can Use Photoshop/Gimp/Whatever you use and just upload the sprites.
If you have any questions/feedback or need any help, just ask me