your going to have to explore some 3d packages.
each person has their favorite package as its methods to create things is worked out by a particular workflow.
once you have mastered the elements of polygon control, then texturing, you should delve into animation.
the file format that works 2nd best is the .x format, you can also use DBO objects as they are more native, work faster etc..
I have not used FPSC so im not totally sure about what methods you need to get it exactly, however the above formats will allow it load into DBP.