Contig is a single-file defragmenter that attempts to make files contiguous on disk . Well, Some people say, that GTA IV has crappy fps. Here's a guide to boost fps while playing. 1. Defrag your computer 2. Download CONTIG in. Contig is more like a defragmenter which goes inside the whole file and finds any fragmented files. Here is how to use it: Place it in your GTA IV. YouTube™ Video: How To Get Better FPS On GTA IV you will be able to see how running a simple program can speed up any game! Contig.