failed to register dll files needed for DTS

I found the information of installing DTS service without installing SQL server on the disc:

INSTALLATION NOTES FOR DATA TRANSFORMATION SERVICES (DTS)
------------------
The following files must be registered using the regsvr32.exe utility:
dtsffile.dll
dtspkg.dll
dtspump.dll
axscphst.dll

Example: regsvr32 80\Tools\Binn\dtsffile.dll

The sqlunirl.dll file should reside in the system folder (i.e., \winnt\system32 or \windows\system).

when I attempted to register the dlls, the message
:"loadLibrary("...\dtsffile.dll")failed - The speified module could not be
found.

is there anything I have to do before I can get the dll registered?

Thanks in advance.problem solved, please consult here:

http://www.sqldts.com/default.aspx?6,105,225,0,1