process_config:  in this file you need to specify the location of the images, the reference image and the directory of your installation.
 
 

default_config: this is the configuration file for the image subtraction software.
 

phot_config: the configuration file for the photometry of the subtracted images.

    Taking the correct set of parameters is important, however most of the default parameters provided in the distribution are quite general, and only a few parameters are really important. The most important parameters are:
 

For image subtraction:

nstamps_x,nstamps_y,sub_x,sub_y,half_mesh_size,half_stamp_size,deg_bg,saturation,deg_spatial

For photometry:

saturation,radphot,rad_aper,psf_width,rad1_bg,rad2_bg

If you are unsure about the setting of the parameters for image subtraction and photometry, try to read the next chapters, and work only on the process_config file.