The GetStringRes number is hard coded into Poser. If you name a body part using one of the preferred Poser names then the program will write it in automatically. Its there to allow different language versions of the program to be read more easily. For example if you name a part "head" Poser will give that a number. Now when someone using a German version of the program loads the file, Poser will read the number and assign the name "kopf" to it. Therefore just name the part using preferred Poser names if applicable and don't worry about the number.

For the OBJ file you will need to keep "objFile 1002 :Runtime:Geometries:" and add on your directory and file name. Note that Poser uses ":" for the separator. Also if you have more that one interchangeable option you'll need to number the next one 1003 and so on.

Sounds like you are going to get down and dirty in the depths of those CR2 files .... good luck :)