install LDOCE5 on CentOS6

Environment:

CentOS 6 x86_64

1.
> cd 'folder of LDOCE5 iso'/ linux
> sudo linux32 ./setup.sh

2. 
error message:
(ldoce5-bin:16815): Gtk-WARNING **: 'clearlooks'

> yum install gtk2-engines.i686

3.

only the user who installed LDOCE5 can use this software
Others can't execute this software.
Each user must install the software for his own usage
> linux32 ./setup.sh

[Ref]
http://terrywang.net/archives/914
http://tw.myblog.yahoo.com/chrysler-wrangler/article?mid=730&prev=764&l=f&fid=10
http://yang.backoz.info:88/post/1/2010/05/02/918