You can hack the executable to change the starting map. Open fallout2.exe with a hex editor, go to offset 0x107ACA, and change 'artemple.map' to 'arvillag.map'. The only glitch is that if you go back into the temple, Cameron isn't there, but his dialogue comes up anyway. If you don't talk him out of fighting, the only way to unlock the last door is by picking it, which is difficult.