in a few weeks i am thinking of taking the overnight bus from mexico, d.f. to palenque, visit the ruins and then take a bus from there to flores, guatemala (any suggestion there?) then after visiting tikal, i would like to take a bus to guatemala antigua (next suggestion?) then from there to san jose in costa rica (next?) from there to david (panama) and the on to boquete(?). on the way back, I would like to go as quickly as possible from boquete to granada(nicaragua) and finally from granada to tapachula in chiapas. any suggestion would be greatly appreciated esp. if they would avoid some of the overnighters with the tica-bus.