V1 is not lower than Vmcg! If V1 were lower than Vmcg the aircraft could yaw off into the terminal with the asymetric thrust following an engine failure...... Vef being lower than V1 and all that. Vmbe can be limiting too. Vr must be greater than 1.05mca and not less than V1. Vmcg and Vmbe are the minimum values of V1 and Vr is the max value as far as I understand. Hope this is right - sitting the exam on Monday. Eek!
Don't think you could increase the weight.
VFE.