how to replace kernel32.dll in win2k/xp

sfc.dll: (W2k SP4)

.text:76986CD1 loc_76986CD1: ; CODE XREF: sfc_1+370j
.text:76986CD1 mov eax, dword_769901D4
.text:76986CD6 cmp eax, 0FFFFFF9Dh
.text:76986CD9 jnz short loc_76986CE2
;patch here!
.text:76986CDB mov eax, esi
.text:76986CDD mov dword_769901D4, eax
.text:76986CE2
.text:76986CE2 loc_76986CE2: ; CODE XREF: sfc_1+382j
.text:76986CE2 cmp eax, ebx
.text:76986CE4 jz short loc_76986D24
.text:76986CE6 cmp eax, esi
.text:76986CE8 jz loc_76986E85
.text:76986CEE cmp eax, 2
.text:76986CF1 jz loc_76986E74
.text:76986CF7 cmp eax, 3
.text:76986CFA jz loc_76986DE8
.text:76986D00 cmp eax, 4
.text:76986D03 jz loc_76986DD7
.text:76986D09 cmp eax, 0FFFFFF9Dh
.text:76986D0C push ebx
.text:76986D0D jz loc_76986E95
.text:76986D13 push offset aSfcdisable ; "SFCDisable"
.text:76986D18 push edi
.text:76986D19 call sub_76988B30
.text:76986D1E mov dword_769901D4, ebx


For the files, you, perhaps, would be interested in sfcfiles.dll