If you imorted a poser scene by FILE>IMPORT, then any jpg textures should have been on the object in C6. (I do it all the time) So, somehow it was lost... To get it back, you select the object, then go into the texture room (paintbrush icon on the upper right of standard workspace). Under the list of shader options will be "color". Click on the drop down arrow for color and you will see one of the options is "texture map". Select this and a browser opens for you to find the jpg or tiff you wish to apply.
Yes, the BEST tutorial is Mark Bremmer's at VTC.
For some simple, quick, and FREE tutorials, see "carraralounge.com".
Over at the DAZ forums are some tutorials on adding your poser runtime to the carrara browser (see BWTR above). Doing it like that is the most efficient way of handling poser content in Carrara.