Solved it! Here's the code I used that may help someone else in the future:
Code:
alias regextest { 
  var %text = door.net <a href="http://www.url.com/cowheadcheese.html"> http://cat.dog.net/dogcatcher/frogsnatcher/ http://car.mart.org chorn.com that.mouse.net ftp://hrm.farkwad.com butter.bowl.turkey myspace.com/scorpwanna http://horse.net scorpwanna.com sub.domain.co.uk ford car.org
  ;var %text = $1-

  echo $color(info) -aeg ---------------------------------
  ;looking only for: *://this.that.com
  var %fullurl = $regex(fullurl,%text,/((?:http|https|ftp):\/\/+(?:|\w+\.)\w+\.(?:com|net|org|ca|au|co.uk|name|us|biz|info)(?:[^\s]*|\/+\w[^\s]*))/ig)

  ;below built for only [fullurl]
  var %i = 1
  var %blah = $regml(fullurl,0)
  echo -ag %fullurl possible full url name(s) found.
  while (%i <= %blah) {
    echo -ag %i $regml(fullurl,%i)
    var %urlreplace = $replace($regml(fullurl,%i),:,$chr(32) $+ colon $+ $chr(32),.,$chr(32) $+ dot $+ $chr(32))
    %text = $replace(%text,$regml(fullurl,%i),%urlreplace)
    inc %i
  }

  echo $color(info) -ag ---------------------------------
  ;looking only for: this.that.com
  var %subdomain = $regex(subdomain,%text,/((?:^|\s)+\w+\.\w+\.(?:com|net|org|ca|au|co.uk|name|us|biz|info)(?:[^\s]*|\/+\w[^\s]*))/ig)

  ;below built for only [subdomain]
  var %i = 1
  var %blah = $regml(subdomain,0)
  echo -ag %subdomain possible subdomain name(s) found.
  while (%i <= %blah) {
    echo -ag %i $regml(subdomain,%i)
    var %urlreplace = $replace($regml(subdomain,%i),.,$chr(32) $+ dot $+ $chr(32))
    %text = $replace(%text,$regml(subdomain,%i),%urlreplace)
    inc %i
  }

  echo $color(info) -ae ---------------------------------
  ;looking only for: that.com
  var %domain = $regex(domain,%text,/((?:^|\s)+\w+\.(?:com|net|org|ca|au|co.uk|name|us|biz|info)(?:[^\s]*|\/+\w[^\s]*))/ig)

  ;below built for only [domain]
  var %i = 1
  var %blah = $regml(domain,0)
  echo -ag %domain possible domain name(s) found.
  while (%i <= %blah) {
    echo -ag %i $regml(domain,%i)
    var %urlreplace = $replace($regml(domain,%i),.,$chr(32) $+ dot $+ $chr(32))
    %text = $replace(%text,$regml(domain,%i),%urlreplace)
    inc %i
  }
  echo -aeg %fullurl url(s) found, %subdomain possible subdomain name(s) found and %domain possible domain name(s) found.
  ;return %text
}


Which returns:
---------------------------------
-
5 possible full url name(s) found.
1 http://www.url.com/cowheadcheese.html">
2 http://cat.dog.net/dogcatcher/frogsnatcher/
3 http://car.mart.org
4 ftp://hrm.farkwad.com
5 http://horse.net
---------------------------------
2 possible subdomain name(s) found.
1 that.mouse.net
2 sub.domain.co.uk
-
---------------------------------
-
5 possible domain name(s) found.
1 door.net
2 chorn.com
3 myspace.com/scorpwanna
4 scorpwanna.com
5 car.org
-
5 url(s) found, 2 possible subdomain name(s) found and 5 possible domain name(s) found.
-

Damn i feel good now. smile