I have succeeded, There is an unpacking tools in the GOTR file.Thank you for your answer again. I edited the swat file myself, so that the original swat and the masked and helmet swat can coexist in the game.I'm testing in the mission, and if there is no problem, I'll release it.In "common.vpp_pc" in your Saints Row 2 root directory (where "SR2_pc.exe" is located). You will need to extract it using minimaul's tools. Just drag "common.vpp_pc" onto "ThomasJepp.SaintsRow.ExtractPackfile.exe", and a new folder will be generated containing all the extracted files.
If you haven't found it already, check out my guide on NPC editing for more information about NPC files.