Can someone tell me if there is a way to add a picture from my computer? I can't change it and I don't want to use that logo that they offer. :/

Hi all I bought my table 2 weeks ago, and installed a unoficial rom and when i restarted the touchscreen not working. I have installed original roms, and other,but never work the touchscreen. I have red in forum that there are touchscreen fix ,but it never work anyone with similar issues can...