Using a 100% save does not harm game devs (the game is over 20 years old) but respects creative effort. Think of it as a time-saver, not a cheat.
Once you have the mcd001ps2 file running, consider these PCSX2 enhancements to make Here Comes the Pain look and play better than ever: Using a 100% save does not harm game
File: mcd001ps2_wwe_hctp_ga_15.ps2 Slot: Memory Card 1 (mcd001) Game ID: SLUS-20762 (NTSC) / SLES-52019 (PAL) Save Tag: Ga 15 Using a 100% save does not harm game