Change Resolution higher than 1024x768
1) Go to C:\Program Files\Softnyx\RakionIS\Scripts
2) Open the file named PersistentSymbols.ini. Open it with notepad.
3) Scroll down until you find a line of writing that says;
persistent extern INDEX m_pixScreenWidth=(INDEX)1024;
4) Change the number 1024 to the one you want, this will modify your screen width.
5) Right underneath this line of text, you will find one called;
persistent extern INDEX m_pixScreenHeight=(INDEX)768;
6) Change the value 768 to the one you want, this controls your screen height.
Exerpt from
http://www.gamerzneeds.net/forums/rakion-bots-hacks-tutorials-discussion/104120-tutorial-how-change-your-rakion-resolution.html