Quote Originally Posted by pseudonym View Post
RewriteEngine On
# Make sure to change "zencart" to the subfolder you install ZC. If you use root folder, change to: RewriteBase /
RewriteBase /

# Deny access from .htaccess
RewriteRule ^\.htaccess$ - [F]

RewriteCond %{SCRIPT_FILENAME} !-f
RewriteCond %{SCRIPT_FILENAME} !-d
RewriteRule ^(.*) index.php?/$1 [E=VAR1:$1,QSA,L]
#### EOF SSU

What's wrong with it?
I have to know where your store is located to know what is wrong with it, for example if it is in a subfolder named shop then it should be RewriteBase /shop

If not, then it is correct. And if you still get the 500 error, you have to check the server error log to know precisely what goes wrong. 500 is a general error which can mean many things.