newmem: 
cmp ecx,00400000 
jb originalcode 

cmp ecx,00780000 
ja originalcode 

mov eax,blaaaa 
sub eax,00400000 
add ecx, eax 

originalcode: 
mov eax,[ebp+10] 
push esi 
push edi 
jmp 45de2c 

0046C3E1: 
jmp newmem