[CCS] Build options

Hello.

I recently install Code Composer 3.1.
I used CCS 1.2 before.

The problem is that I did not success in getting the same .hex file 
(from the same code)  with CCS 1.2 and CCS 3.1

I only have assembly code, no C code.
To build my project I only use assember, linker and hex converter).

I would like to use CCS 3.1 IDE, with older version of asm500 , and 
lnk500. It does not work if I just replace the executable in 
.\C5400\cgtools\bin\

How to do this ?
Thank you for your help