How do you remove and replace an engine in a Saturn L-series car?

These cars have European engines in them and every screw has to be torqued right or before you know it some seals are leaking and there goes the head gasket!!! not to mention the various electrical components, however, the 4 cylinder is the easier of the two, but I would only do it as a last resort, and would recommend paying somebody (a liscensed mechanic - preferably saturn- though expensive) to do it, because in the long run you will screw something up!!!