DF windows: custom reaction reagent use

Original code:

.text:00916BCE                 mov     edi, ebp
.text:00916BD0                 call    eax
.text:00916BD2                 test    eax, eax
.text:00916BD4                 jnz     short loc_916C1C

.text:00916C0A                 mov     edi, ebp

.text:00916C14                 mov     edi, ebp

Patch:

0x2ac34:
CC CC CC CC CC CC CC CC CC CC CC CC
8B 7C 24 78 8B 3C B7 FF D0 EB 25 CC

.text:0042B834 loc_42B834:
.text:0042B834                 mov     edi, [esp+78h]
.text:0042B838                 mov     edi, [edi+esi*4]
.text:0042B83B                 call    eax
.text:0042B83D                 jmp     short unk_42B864

0x2ac64
CC CC CC CC CC CC CC CC CC CC CC CC
85 C0 E9 69 B3 4E 00 CC CC CC CC CC

.text:0042B864 loc_42B864:
.text:0042B864                 test    eax, eax
.text:0042B866                 jmp     loc_916BD4

0x515fce
8B FD FF D0 85 C0
E9 61 4C B1 FF 90

.text:00916BCE                 jmp     loc_42B834
.text:00916BD3                 nop
.text:00916BD4 loc_916BD4:

0x51600a
8B FD
90 90

.text:00916C0A                 nop
.text:00916C0B                 nop

0x516014
8B FD
90 90

.text:00916C14                 nop
.text:00916C15                 nop


You can use this script to apply the generated patch below:
http://stalkr.net/files/ida/idadif.py

----8<----
This difference file is created by The Interactive Disassembler

Dwarf Fortress.exe
0002AC34: CC 8B
0002AC35: CC 7C
0002AC36: CC 24
0002AC37: CC 78
0002AC38: CC 8B
0002AC39: CC 3C
0002AC3A: CC B7
0002AC3B: CC FF
0002AC3C: CC D0
0002AC3D: CC EB
0002AC3E: CC 25
0002AC64: CC 85
0002AC65: CC C0
0002AC66: CC E9
0002AC67: CC 69
0002AC68: CC B3
0002AC69: CC 4E
0002AC6A: CC 00
00515FCE: 8B E9
00515FCF: FD 61
00515FD0: FF 4C
00515FD1: D0 B1
00515FD2: 85 FF
00515FD3: C0 90
0051600A: 8B 90
0051600B: FD 90
00516014: 8B 90
00516015: FD 90