TOPIC:

I need to install CT in D: as I am using SSD of 120GB, how can I install it?

Sir, this is NOT possible.
CodeTyphon it's not portable.

1)
delete c:\codetyphon\
create d:\codetyphon\

cmd.exe /c mklink /J "c:\codetypthon\" "d:\codetyphon\"

2)
change install.bat line 41
from:
if EXIST C:\codetyphon (
to
if EXIST C:\codetyphonBLA (

3)
install normally

Start and use via path c:\codetyphon\
but storage space will only be taken from d:

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Even Network drive installation is possible, then use this command in 1) :
cmd.exe /c mklink /D "c:\codetypthon\" "n:\codetyphon\"

replace n: with your actual network drive letter.
All other steps remain necessary.

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From now on even online-inplace updates work as intended, without further modifications.