diff --git a/README.md b/README.md
index 486dabe..a8dc1ca 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 A helpful script for simplifying connections to servers and devices on your network.
 
-## To use:
-
+----------------------
+## Shell Setup
 Add the script as a source file in your shell prompt, such as a line similar to this:
 
 ```
@@ -19,3 +19,37 @@ Default username (bob.user)
 
 Once done, all hostnames in the DNS zone should be available for SSH/Telnet/RDP by a tab-completable alias of just the hostname (in new shell sessions).
 
+#### Can I change the window geometry for rdesktop?
+No. Not yet. You get 1600x900. See the bottom of this ReadMe for details.
+
+
+## DNS Setup
+You'll likely want to create a DNS zone specifically for this script for better control over the hosts included. I would recommend using a TLD not normally available, to be sure you don't have any overlap with existing DNS names. This domain doesn't need to be publicly queried, and actually it's probably in interest of security if it isn't.
+
+The best way to explain the zone set up is by example. Let's assume you create the zone "**not-a-real.lan**" and you have 5 hosts, known as *host1.not-a-real.lan* through *host5.not-a-real.lan*.
+If you create the following entries (BIND format shown):
+```
+$ORIGIN not-a-real.lan.
+
+host1		IN	A	10.0.0.1
+host2		IN	A	10.0.0.2
+host3		IN	A	10.0.0.3
+host3		IN	TXT	"cisco"
+host4		IN	A	10.0.0.4
+host4		IN	TXT	"windows"
+host5		IN	A	10.0.0.5
+```
+
+#### How will this work on the client?
+In this case, the script will create aliases called *host1* through *host5*.
+
+Hosts 1, 2, and 5 will connect with, for example, `ssh -t your.username@10.0.0.1`
+
+The `host3` alias is tagged with a TXT record for cisco, so it will be: `telnet 10.0.0.3`
+
+`host5` is tagged as a Windows host, so it will use: `rdesktop -g 1600x900 -u your.username 10.0.0.5`
+
+
+#### Can I change the window geometry for rdesktop?
+This last one, rdesktop, is harcoded to use 1600x900 geometry for now. Very likely, a variable will be added later to allow customization, but for now most people can accomodate 1080p-like resolutions, so this size should be "generally acceptable" for an average workstation. Perhaps a little less-so for a laptop.
+
diff --git a/tab-sorcery.sh b/tab-sorcery.sh
index a956b8f..1b0b508 100644
--- a/tab-sorcery.sh
+++ b/tab-sorcery.sh
@@ -8,6 +8,11 @@
 scan_domain=$1
 scan_ns=$2
 
+get_hostip () {
+	#host_ip=`echo $zone_xfer | grep ${host} | grep A | awk '{print $3}'`
+	host_ip=`echo $zone_xfer | grep $1 | grep A | awk '{print $3}'`
+}
+
 zone_xfer=`dig $scan_domain @$scan_ns AXFR | egrep -v 'SOA|NS|MX|DiG' | grep $scan_domain | awk '{print $1,$4,$5}'`
 for host in `echo $zone_xfer | awk '{print $1}'`; do
 	user_name=$3
@@ -16,22 +21,23 @@ for host in `echo $zone_xfer | awk '{print $1}'`; do
 	if echo $zone_xfer | grep $host | grep TXT; then
 		if [ "`echo $zone_xfer | grep $host | grep TXT | awk '{print $3}'`" = '"lxc"' ]; then
 			user_name="root"
-			host_ip=`echo $zone_xfer | grep ${host} | grep A | awk '{print $3}'`
+			get_hostip ${host}
 			alias ${host_short}="${connect_cmd} ${user_name}@${host_ip}"
 		elif [ "`echo $zone_xfer | grep $host | grep TXT | awk '{print $3}'`" = '"windows"' ]; then
 			connect_cmd="rdesktop -g 1600x900"
-			host_ip=`echo $zone_xfer | grep ${host} | grep A | awk '{print $3}'`
+			get_hostip ${host}
 			alias ${host_short}="${connect_cmd} -u ${user_name} ${host_ip}"
 		elif [ "`echo $zone_xfer | grep $host | grep TXT | awk '{print $3}'`" = '"cisco"' ]; then
 			connect_cmd="telnet"
-			host_ip=`echo $zone_xfer | grep ${host} | grep A | awk '{print $3}'`
+			get_hostip ${host}
 			alias ${host_short}="${connect_cmd} ${host_ip}"
 		fi
 	else
-		host_ip=`echo $zone_xfer | grep $host | grep A | awk '{print $3}'`
+		get_hostip ${host}
 		alias ${host_short}="${connect_cmd} ${user_name}@${host_ip}"
 	fi >/dev/null
 done
 
+unset -f get_hostip
 return 0