You're looking for information on a Fallout 3 trainer, specifically version 1.7.04. Here's what I found:
For many players, such trainers did not “ruin” the game but rather customized the difficulty. Fallout 3 ’s bullet-sponge enemies and scarce repair materials made a trainer feel less like cheating and more like a the developers had omitted.
The in the trainer’s name almost certainly refers to v1.7.0.4 of the game executable ( Fallout3.exe ). This was the final, most stable version of the vanilla game before the "Games for Windows Live" (GFWL) removal patches. Trainers are extremely version-sensitive; a trainer built for v1.6 will crash v1.7, and vice versa.