I want to express my gratitude and appreciation for all of your help. I have posted numerous questions over the last several years since I switched to apple products and it is nice to have a community of knowledgable people who are very helpful. It takes the guess work out of where to go for support and help. Thanks again!!

We need to know if the Airport Extreme Base station (AEBS) is doing DHCP/NAT/Firewall if so the suggestions so far are not ideal.
Is the modem just a modem or is it doing other functions ? maybe tell us what the box is ;-)

Here is a diagram of what i would do if i was in your situation. However i don't use Apple networking hardware but the principle is same ;-)
You could get away with not having the ethernet switch as currently you only need 2 live network sockets in house and the AEBS has 3 LAN ports.
My moto is wire in when you can hence why i have added a AEBS to office to provide wired and main wifi for bulk of house. The far end of house just needs an AE (airport express). One of the more ridiculous bits of this puzzle will be if your old AEBS is compatible with newer Airport Utility !

The picture is becoming a bit clearer now. I know I can wirelessly daisy chain the express to the extreme which may work. I will pick one up today and see if it does the trick. If not, Can I wirelessly daisy chain another extreme with the one I have now? If none of these 2 scenarios work, then I will have to back feed cables from my bedroom back to the basement and then up to the bedroom to achieve this.

Are the wall sockets in rooms singles or doubles ? if doubles i would wire them.

The wall sockets are double (one on top of the other)

What does the number of wall sockets have to do with wiring?

They should correspond to Patchbay unit in basement

ie. wall socket 1/2 run back through building to patchbay sockets 1/2 etc

This sounds like a BFD and quite an undertaking. I hope the express does the trick. I guess there is no way to daisy chain another extreme wirelessly to the one I have now, right?

This is pretty basic networking don't be scared off ;) My diagrams hopefully are enough to go on. Best thing to do is get it all working with devices side by side linked with a cable then do the positioning and network route.

Seriously WDS ( wireless distribution systems) are a PITA and much less reliable and slower for most operations. I have had my fair share of this back in the day...we now just hard wire everything as much as possible.
http://en.wikipedia.org/wiki/Wireles...ibution_system

Also really all you need to do is buy the Airport express. Plug in an ethernet cable from AEBS to AE then configure AE. Check all working.
Then move the AE to bedrooms and wire in to wall socket and "patch it" so it is connected to AEBS like in my diagram.

Correction. The ethernet outlets are single

Do you have 2 in office ?

No, there is one ethernet port in my office.

To answer an early question, YES you can daisy chain extremes. Express on the other hand can potentially be fussy at least in the past about being daisy chained wired. They both do extension by WDS (wifi). Newer express are much better. That said unless have a very specific use case for the express I prefer the greater range and greater capabilities of the extremes. The only things an Express does uniquely 1) Cheaper 2) Can act as a ethernet bridge for a non wifi device but the Extreme can serve up most printers, etc. 3) Music streaming.

Adding an Ethernet switch as I mentioned earlier is going to be helpful.

dpriest can you try to give us a list of all your hardware and diagram of all the relevant rooms and whether they have ethernet wiring.

Switches are cheap Agentx may have an explanation but anywhere you short a port a switch can be added for little money. I like Agentx diagram in post 22 though I am not sure we clear enough on your complete set up to state that is exactly how it should be done.

So you know a patch panels purpose is to allow for durable and alterable connectivity. That is, say in an office setting with 100s of wall plates/potential network connections per floor you patch in the connections you need. All wiring in pro set ups are also done to back of a patch panel and then you patch from the panel to your switch, there is not really a choice since that is where the wiring terminates/goes to (there literally punched in the back of the panel, they are not connected with removable cables). Do you have a patch panel of any kind now? Where does all your wiring go to?

Looks like it is WDS for you then.

In most situations we tend have Main base station > relay station AE > remote base station AEBS or another AE. If you buy a new extreme you may want to make that the main base station. Remember Apple give you a 14 day no quibble money back gurartenee (well in uk anyway). I tend to buy more hardware than needed get it all working and take back what I don't need.

If you get new AEBS you may not need the relay. Overall it should be noted that things get tricky if all your WIFI hardware does not match. Also 2.4ghz signal penetrates walls well but 5ghz should be used for same room application. Just another layer of complication.

I have done quite a lot of WIFI systems in last 5 years. We tend to put fixed same room media devices on 5GHZ. Then the bulk of connection to network is on 2.4ghz as we found the Apple devices were getting slower speeds most of time as they jumped onto 5ghz by default. TBH apple devices do not have the best WIFI performance in many respects and this ended up causing lots of issues.

Went out and picked up an express that did the trick, and is working great:)

Happy days ;-)

Cool, glad it was powerful enough.