converting Tconf script to RTSC configuration script file

I am reading "Migrating a DSP/BIOS 5 application to SYS/BIOS 6". I want to how to convert a Tconf script to a RTSC configuration script. chapter 2.4

I downloaded spraas7.

I made folder "C:\Documents and Settings\user\workspace_v5_4_3\mailbox" and copy mailbox.c, mailbox.tci, mailbox.tcf, mailbox_evmOMAPL138_custom.tci, evmOMAPL138_common.tci files according to reference.

Run command prompt.

Type cd c:\documents and settings\user\workspace_v5_4_3\mailbox

xs --xp="C:\CCStudio_v4.2\bios_6_32_02_39\packages" ti.bios.conversion -c mailbox.cfg --pr "C:\documents and settings\user\workspace_v5_4_3\mailbox" mailbox.tcf

I installed CCS v4.2.4 program to "C:\CCStudio_v4.2", so put that instead of "%XDCPATH%".

result is "xs is not internal or external command, a program which is run, or batch file"

How can I do?