hi guys

im new on this ericsson wave of modding, i just replaced my custom_upgrade file with one with a different CAD in order to receive all the latest updates on my c905, i had some problems getting the chat-style SMS mode and so i had to change the CAD, but now i wanted Flash Menus but all the tutorials ask me to replace the custom_upgrade file again and im afraid im might change it and stop receiving the benefits of the update services

any ideas or suggestions?