The below file will show in the browser window all the posts in MT format which can then be imported into B2Evo. This is how it works

1. Download the file and place it in your root directory of your simple php blog.
2. Call it via http protocol.
Eg. http://example.com/mt.php?n=10000
3. The reason why i have the n so high is because it parses the number of posts that you would like to import from the newest to oldest. I just thought that a lot of people would like that functionality and flexibility in case you have like 10,000 posts and only wanted the most recent 500.
4. This import script does not yet support comments but i'm sure I could rewrite it to. If you need that let me know and i'll dig up the code
5. HAVE FUN WITH B2EVO!!!

<?php
  
  // Include Required Functions
  require_once('scripts/sb_functions.php');

  read_config();

  require_once('languages/' . $blog_config[ 'blog_language' ] . '/strings.php');
  sb_language( 'index' );

  // Please note, you can change the number of entries that appear by
  // passing the variable 'n' in the URL. You can also limit it to a certain
  // category by passing 'c'. For instance, this will make it show
  // 20 entries in the 'tech' category:
  // http://www.mywebsite.com/rss.php?n=20&c=tech

function generate_mt ( $max_entries=0, $category='' )
	{
		// Read entries by month, year and/or day. Generate HTML output.
		//
		// Used for the main Index page.
		global $lang_string, $blog_config, $user_colors, $sb_info;
		
		$entry_file_array = blog_entry_listing();

	 	$port = ':' . $_SERVER[ 'SERVER_PORT'];
		if ($port == ':80') {
			$port = '';
		}
		if ( ( dirname($_SERVER[ 'PHP_SELF' ]) == '\\' || dirname($_SERVER[ 'PHP_SELF' ]) == '/' ) ) {
			// Hosted at root.
			$base_url = 'http://' . $_SERVER[ 'HTTP_HOST' ].$port. '/';
		} else {
			// Hosted in sub-directory.
			$base_url = 'http://' . $_SERVER[ 'HTTP_HOST' ].$port.dirname($_SERVER[ 'PHP_SELF' ]) . '/';
		}
		
		header('Content-type: text/plain');

		// Read entry files
		if ( $max_entries<=0 ) {
			$max_entries=min( $blog_config[ 'blog_max_entries' ]<<1, count( $entry_file_array ) );
		}
		else {
			$max_entries=min( $max_entries, count( $entry_file_array ) );
		}
		$entries=0;
		$i=0;
		while ( ( $entries<$max_entries ) && ( $i<count( $entry_file_array ) ) ) {
			list( $entry_filename, $year_dir, $month_dir ) = explode( '|', $entry_file_array[ $i ] );
			$contents=blog_entry_to_array( CONTENT_DIR . $year_dir . '/' . $month_dir . '/' . $entry_filename );
			$cats = split( ',', $contents[ 'CATEGORIES' ] );
			for ( $j = 0; $j < count( $cats ); $j++ ) {
				if ( ( empty( $category ) ) || strpos( ',' . $category . ',', ',' . $cats[ $j ] . ',' )!==false ) {
					$entries++;
					//Required item fields
					echo "AUTHOR: " . $blog_config[ 'blog_author' ]  . "\n";
					echo "TITLE: " . clean_rss_output( blog_to_html( $contents[ 'SUBJECT' ], false, false ) ) . "\n";
					echo "DATE: " . gmdate( 'm/d/Y H:i:s', $contents[ 'DATE' ] ) . "\n";
					//Optional item fields
					echo "CATEGORY: ";
					for ( $k = 0; $k < count( $cats ); $k++ ) {
						echo get_category_by_id( $cats[ $k ] );
						if ( $k < count( $cats ) - 1 ) {
							echo ', ';
						}
					}
					echo "\n";echo "-----\nBODY:\n" . clean_rss_output( replace_more_tag( blog_to_html( $contents[ 'CONTENT' ], false, false ), true, '' ) ) . $content_footer . "\n--------\n";
					break;
				}
			}
			$i++;
		}

	}

  // Output Page
  generate_mt( @$_GET[ 'n' ], @$_GET[ 'c' ] );
?>