[Groff] Newbie to groff question. Image "figure: X.X" generation problems.

[javier . gracia]

Hi all.

I have written a document and formatted it using groff and the "ms" macro. Now 
I want to include references to the pictures included to produce a table of 
pictures, and to refer to them through the text by their number.

I tried to use .FG to do the work, but it is used with the "mm" macros, and my 
source files doesn't compile with "groff -mm ".

Is there any easy way I can use .FG in my source files ( maybe with some option 
in "groff -ms -<??>". 

Sorry if the question is too simple for this list, help or pointing me to the 
correct direction will be heavily appreciated.

--------------------------------------------

Some info:
GNU troff version 1.15 on Debian Potato.

Error when using groff -ms:
 warning: `FG' not defined

I'm using 
.PS
copy "/path/to/fig.ps"
.PE
to include the figures.