It's a bug in DP2. The Client doesn't unload the previous skin so when you go trough a lot of skins it begins to lag and eventually even crash. This has been fixed in DP3 though.
I guess you could do something like this
InfoVeh = { id, pos_x, pos_y, pos_z, pos_za, color1, color2 }
VehicleInfo = {}
for i=1,700 do -- from VehicleInfo[1] to VehicleInfo[700]
VehicleInfo[i] = InfoVeh
end
And later set the value like this:
VehicleInfo[13].id = 12