Need advice, about hexing

[Chale001]

Hihi ^^ I want to hex KealyFPSLimiter into my engine, but I dont know which dll should i replace then... and I don't want to ruin something maybe I remove a reliable dll or something, so here are the dlls i have:
Clean:
1.d3d9.dll
2.dpnet.dll
3.d3d8.dll
4.dinput.dll
5.dplayx.dll
6.d3drg8x.dll
7.ddraw.dll
8.d3d9d.dll
9.d3d9.dll
10.China.dll
11.mscoree.dll
12.kernel32.dll
13.user32.dll
14.dbghelp.dll
15.WS2_32.dll
16.IMM32.dll
17.MSGIM32.dll
18.DSOUND.dll
19.d3d9.dll
20.WINMM.dll
21.KERNEL32.dll
22.USER32.dll
23.GDI32.dll
24.cskill.dll
25.Client.dll
26.SHELL32.dll
27.ole32.dll
28.OLEAUT32.dll
29.VERSION.dll
30.comdlg32.dll
31.kernel32.dll
32.dbghelp.dll
33.WS2_32.dll
34.IKK32.dll
35.MSIM32.dll
36.DSOUND.dll
37.d3d9.dll
38.WINMM.dll
39.USER32.dll
40.GDI32.dll
41.COMCTL32.dll
42.ADVAPI32.dll
43.SELL32.dll
44.ole32.dll
45.OLEAUT32.dll
46.VERSION.dll
Forgive my poor knowledge, I might be doing something unsmart that is why I choose asking.
Thanks in advance =)

[MentaL]