HD Install :: locales

I want to make a chinese version of DSL.

1. Download dsl-dpkg.dsl and execute "apt-get update".
2. Modify "/etc/apt/source.list",change "stable" to "testing".
3. apt-get install libc6. But I failed at this step.
libc6 can't be installed successfully.

If it finished,I will install locales,then add zh_CN.GBK to locales -> locale-gen -> add chinese fonts -> add some lines into .bashrc like below:
export LC_ALL=zh_CN.GBK
export LC_CTYPE=zh_CN.GBk
export LANG=zh_CN.GBk
export XMODIFIERS=``@im=Chinput''

Do those steps right?

Please give me some help,because I can't stand for running DSL without chinese support.

Thanks a lot.

original here.