(Sorry for the vague title)
Ive just downloaded the LiteStep Installer version and I want to change the theme. I have downloaded a few and i get the same problem with all. To change the theme i have to go to:
Litestep> Change Themes> Install theme.
There, I have to browse the file of the theme i wish. It only accepts .lst, .lsz and .zip. As I havent found any . lst nor .lsz file y selected the zip of the file I downloaded, for example ultimatum, and when i try to install it the following error occurs:

"WARNING: $ThemesDir$ultimatum already exists and will be overwitten
ERROR: extraction of theme archive to ThemesDir failed, exiting (ATTENTION: you're not trying to install a theme whose files are in use are you?)
theme was not installed"

I wasnt using that file...

I would really appreciate if you helped me, keep in mind this is teh first time I use it. I havent found any information to solve this problem/doubt.

See ya..

Thanks in advance

Is it really a zip file or is it a .rar? I'd just manually extract the theme from the archive and place it in your "themes" folder. Then select "Refresh list" from the menu. You should then be able to switch to the theme using the popup menu.

well the error message that you got there says that you already installed the theme.

I downloaded another theme and afterwards, all the themes i was trying to install appeared as installed O.o

Thank You anyway

do you still have write access to your themes folder?