Ranks

[Eleeist]

Where I can change user ranks, or add some new?

[sherpa サイバー侍]

do you mean user group name?
admin center>>Membergroups(it is in left sidebar of your admin center)

[JimM]

The information sherpa　サイバー侍 gave you is how you would add the membergroups.  Once your have done that you can add the images for each membergroup.  You FTP them to your /Themes/default/images.

If this is solved feel free to mark it as solved otherwise reply with some details.