I have been told that I need to change out the modules on my bowin order to change the draw lengh.
Does anyone on here have any knowledge about this.
PSE FirestormLite Hybrid cams.

I beleive that if you want to make big adjustments to your DL like 1-2'' then you would want to change modules. But, for minor ones I think you can just move the string to different posts. I am not sure but that is how I do it on my old PSE Nova.

NRG™ Hybrid Cam [hr]
The NRG Hybrid cam is highly adjustable and one of the most lethal cams PSE has ever produced. It has straight and level nock travel and is adjustable stop for 65% or 80% effective let-off with stop position and stop alignment marks in five discreet module sizes and multi-post string length settings for an additional + or - 3/8" of draw length adjustment.