There is an issue during "anaconda --test"

[zchen <smile-spark 163 com>]

 I am building a latest CentOS5 and every newest stuff is ready. All are
in directory "/linux/CentOS/5-respin/os/x86_64". My OS is CentOS5 too. I
want to add some other pictures during installation process, so anaconda
adjustment is needed.
When I run command "anaconda --test
--method=hd://linux/CentOS/5-respin/os/x86_64", a error message followed:
Traceback (most recent call last):
File "/usr/sbin/anaconda", line 702, in ?
for i in os.listdir("/mnt/runtime/usr/sbin"):
OSError: [Errno 2] There is no such file or directory:
'/mnt/runtime/usr/sbin'
Which option should I added? Did I forgot something else? Is there
anyway to fix it?
Thanks in advance.