[Pharo-users] changes and sources file availability

Hello, In Pharo 2.0, we could enforce the image not to look for sources and changes file at the startup with: SmalltalkImage checkChangesFileAvailability: false; checkSourcesFileAvailability: false. I could not found these selectors anymore in my Pharo 3.0 image. Clement mentioned to me a while ago that it was due to the change of compiler (Opal) and it might not be safe to remove these files (if I remember correctly). So, my question: 1/ Can I remove these two files safely from my production image? 2/ If the answer to 1/ is yes, how can I tell my image not to look for these files at image startup? tx, Usman