Drupal 7.x

whenever i install it shows the following problem on second step after choosing language...

The Drupal installer requires that you create a settings file as part of the installation process.
Copy the ./sites/default/default.settings.php file to./sites/default/settings.php.
Change file permissions so that it is writable by the web server. If you are unsure how to grant file permissions, please consult the on-line handbook.
More details about installing Drupal are available in INSTALL.txt

I have a page with form that im calling in hook_menu. But in D7 my site freezes. When i print the form with drupal_get_form i get an array not a rendered form which has changed in d7 so i have to use drupal_render. But here http://drupal.org/update/modules/6/7#menu_callback_array is said that "If you find yourself calling render() or drupal_render(), you're probably making a mistake.". So ive looked at node's hook_menu and its the same as mine.

On Win7, I installed XAMPPLite and Drupal 7 a week ago. Everything has been running fine. D7 is outstanding. Took only a few days to smooth out a new theme from scratch.

Now this morning when I try to log on from localhost/drupal I get this in the Apache error log:

[Sat Aug 07 07:24:45 2010] [error] [client 127.0.0.1] Directory index forbidden by Options directive: C:/xampplite/htdocs/drupal/node/, referer: http://localhost/drupal/

How do you place drupal modules in their own virtual host? For example, I want the forum to appear at forum.mysite.com, and the blog to appear at blog.mysite.com. I know how to set up virtual hosts in apache, but I'm not sure what I should put for the DocumentRoot. I tried putting the DocumentRoot as the URL that appears when I display the forum or the blog, but obviously that doesn't work.

I've seen a few posts/articles about installing virtual hosts with drupal but I didn't feel they answered my question. Thanks!

I need a Drupal 7 module that would allow anonymous users to switch theme by entering specific URI query string. For example:
- www.mysite.com/&q=garland would switch to Garland
- www.mysite.com/&q=seven would switch to Seven

I am new to Drupal but I am an experienced PHP developer. I installed version 7.x on Mac OSX 10.6 to use a test machine to become familiar with how it works. I am accessing the Drupal installation at localhost.

Strange things seem to be happening when I attempt to install a new module or theme.

If I attempt to install either a theme or a module from a URL, Drupal shows me a form titled "Authorize file system changes" immediately after clicking the "Install" button on the module installation page.