Drupal fatal errors

Ok... so I've had drupal installed on ChrisDillingham.com for two days now and have already run into two big errors that I've had to solve. I'd like to say that this is a good thing, since it forces me to learn more about Drupal. Maybe I'll say that tomorrow.

The first error was caused by a misclick in my ftp program. I accidentally moved a "system" folder from the modules into my hosting root. (I hate laptop trackpads, btw) Fortunately, I was at the BG geeks meeting with Kevin Swanson, who, after showing me the PHPmyadmin panel, helped me figure out that I had nothing to lose by reinstalling drupal altogether. Then we discovered the source of the error and I fixed it later that day.

Now I've installed a handful of modules that should eventually prove useful, and after posting some content and messing with the layout, I kept running into a memory error intermittently. I figured that maybe I installed too many modules. No problem - I'd just go into the modules administration and turn off something until I found a workaround. Trouble is, going to the modules folder caused the fatal error:

Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 340538 bytes) in /home/sites/chrisdillingham.com/public_html/ ...

I tried the instructions at http://drupal.org/node/207036 to increase the php memory limit. I couldn't find a php.ini, and changing my .htaccess caused an internal server error. Ultimately I went into the sites/default/settings.php and added the line...
ini_set('memory_limit', '16M');

... to the end of the PHP section. No dice until I changed the 16M to 64M. Now my site's back up and all seems well.

At least I'm learning.