We have made an experimental study on the transport properties in as-grown polythiophene and poly(3-methylthiophene) films doped with PF6.. Precise measurements were made of the four-terminal DC resistivity, the Voltage-Shorted-Compaction resistivity and the absolute thermoelectric power between 1.6-300K with an aim to abstract the transport properties inherent to the crystallized regions of polymeric materials. The results are strongly indicative of the occurrence of a metal-insulator transition within the crystallized (metallic) regions at low temperatures. The difference in the transport property of bulk materials is understood by their different transition temperatures.