Compex WPQ618 Support

Hi. I have purchased a Compex WPQ618 development board. Currently it is running CompexWrt which is looks like openwrt but a lot different. I'm also not able to install any new packages.

I need to build custom image for the board and have reached a dead end on the topic. Can someone help me on this or point me to resources that could be helpful?

Thanks in advance!