installation errors

[notallowed]

Hello,

For one week i am trying to install this control panel. I have the 1.0.2. I have followed all the instructions in the install file and at the end i am getting this errors :

Can't exec "which": No such file or directory at ispcp-setup-methods.pl line 652.
Can't exec "which": No such file or directory at ispcp-setup-methods.pl line 653.
Use of uninitialized value in substitution (s///) at ispcp-setup-methods.pl line 655.
Use of uninitialized value in substitution (s///) at ispcp-setup-methods.pl line 656.
Use of uninitialized value in length at ispcp-setup-methods.pl line 658.
Use of uninitialized value in length at ispcp-setup-methods.pl line 658.
ERROR: Undefined template replacement data in repl_var: {RKHUNTER}!


Does someone managed to install this control panel without problems?

I have a CentOS 5.3 VPS system.