#!/usr/bin/perl

use strict;
use warnings;
use HTML::TokeParser::Simple;

my $html;
{
  local $/ = undef;
  $html = <DATA>
}

my $tp = HTML::TokeParser::Simple->new(\$html)
  or die "Couldn't parse $html: $!";

my (@results);
while (my $t = $tp->get_token) {
  if ($t->is_start_tag('img')){
    push @results, $t->get_attr('src');
  }
  elsif ($t->is_text){
    push @results, $t->as_is;
  }
}

print "*$_*\n" for @results;

__DATA__
<br><br>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td align="left" valign="bottom">
<img src='http://images.tek-tips.com/items/image001.gif' alt='Image001
+' width='40' height='40' border='0'>
Description of image here
</td>
<td align="right" valign="bottom"></td>
</tr>
<tr>
<td align="left" valign="bottom">
<img src='http://images.tek-tips.com/items/image002.gif' alt='Image002
+' width='40' height='40' border='0'>
Description of image here
</td>
<td align="right" valign="bottom">
</td>
</tr>
</table>
[download]

The 'text' comes with a fair bit of white space which you need to remove.