You should probably explain a bit more than that to him...
Code:
0050DE73 |. 68 B09C5C00 PUSH GunzOld.005C9CB0 ; ASCII "Admin.Announce"
0050DE78 |. 68 F5010000 PUSH 1F5
0050DE7D |. 8BC8 MOV ECX,EAX
0050DE7F |. E8 FC17FEFF CALL GunzOld.004EF680
0050DE84 |. 8BF8 MOV EDI,EAX
0050DE86 |. EB 02 JMP SHORT GunzOld.0050DE8A
0050DE88 |> 33FF XOR EDI,EDI
0050DE8A |> 57 PUSH EDI ; /Arg1
0050DE8B |. 8BCB MOV ECX,EBX ; |
0050DE8D |. 897424 24 MOV DWORD PTR SS:[ESP+24],ESI ; |
0050DE91 |. E8 2AE0FEFF CALL GunzOld.004FBEC0 ; \GunzOld.004FBEC0
0050DE96 |. 6A 48 PUSH 48
0050DE98 |. E8 38290900 CALL GunzOld.005A07D5
0050DE9D |. 83C4 04 ADD ESP,4
0050DEA0 |. 894424 14 MOV DWORD PTR SS:[ESP+14],EAX
0050DEA4 |. 85C0 TEST EAX,EAX
0050DEA6 |. C74424 20 C802>MOV DWORD PTR SS:[ESP+20],2C8
0050DEAE |. 74 10 JE SHORT GunzOld.0050DEC0
0050DEB0 |. 68 A49C5C00 PUSH GunzOld.005C9CA4 ; ASCII "uidAdmin"
0050DEB5 |. 6A 09 PUSH 9
0050DEB7 |. 8BC8 MOV ECX,EAX
0050DEB9 |. E8 0201FEFF CALL GunzOld.004EDFC0
0050DEBE |. EB 02 JMP SHORT GunzOld.0050DEC2
0050DEC0 |> 33C0 XOR EAX,EAX
0050DEC2 |> 50 PUSH EAX
0050DEC3 |. 8BCF MOV ECX,EDI
0050DEC5 |. 897424 24 MOV DWORD PTR SS:[ESP+24],ESI
0050DEC9 |. E8 3220FEFF CALL GunzOld.004EFF00
0050DECE |. 6A 48 PUSH 48
0050DED0 |. E8 00290900 CALL GunzOld.005A07D5
0050DED5 |. 83C4 04 ADD ESP,4
0050DED8 |. 894424 14 MOV DWORD PTR SS:[ESP+14],EAX
0050DEDC |. 85C0 TEST EAX,EAX
0050DEDE |. C74424 20 C902>MOV DWORD PTR SS:[ESP+20],2C9
0050DEE6 |. 74 10 JE SHORT GunzOld.0050DEF8
0050DEE8 |. 68 14CE5C00 PUSH GunzOld.005CCE14 ; ASCII "Msg"
0050DEED |. 6A 04 PUSH 4
0050DEEF |. 8BC8 MOV ECX,EAX
0050DEF1 |. E8 CA00FEFF CALL GunzOld.004EDFC0
0050DEF6 |. EB 02 JMP SHORT GunzOld.0050DEFA
0050DEF8 |> 33C0 XOR EAX,EAX
0050DEFA |> 50 PUSH EAX
0050DEFB |. 8BCF MOV ECX,EDI
0050DEFD |. 897424 24 MOV DWORD PTR SS:[ESP+24],ESI
0050DF01 |. E8 FA1FFEFF CALL GunzOld.004EFF00
0050DF06 |. 6A 48 PUSH 48
0050DF08 |. E8 C8280900 CALL GunzOld.005A07D5
0050DF0D |. 83C4 04 ADD ESP,4
0050DF10 |. 894424 14 MOV DWORD PTR SS:[ESP+14],EAX
0050DF14 |. 85C0 TEST EAX,EAX
0050DF16 |. C74424 20 CA02>MOV DWORD PTR SS:[ESP+20],2CA
0050DF1E |. 74 10 JE SHORT GunzOld.0050DF30
0050DF20 |. 68 9C9C5C00 PUSH GunzOld.005C9C9C ; ASCII "MsgType"
The PacketID (also colored in red) is 0x1F5, so just find command "PUSH 1F5", scroll to the top of the function and you got your address.