roouter linksys WRT54G antenna booster

might invest in a high gain antenna?

http://www.newegg.com/Product/Product.aspx?Item=N82E16833124156

But your mileage may vary....read the reviews, and you'll see....for some it works well...some not as much etc.  

As some reviews state....Line of site is drastically improved, but going through walls etc did not provide as much gain.  But still, many are happy to receive an extra bar etc.  and a bit extra DB gain!

I see that the router has two antennas should I buy 4 or just 2 and put them in the outgoing and incoming?

Go big or go home buy 4.

what do you guys think about this one? it shows 9dBi..
http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US%2FLayout&pagename=Linksys%2FCommon%2FVisitorWrapper&cid=1166859687870

Outside wireless gear have different specs then inside, I would call Linksys and verify it will work with your wrt54g before buying

I dont know why you would need four...two would be fine....since you have two posts....not four....unless you are talking about adding them to your wireless cards....in which case the one that needs the most boost would be the one you'd want to replace, unless you have more than one machine needing more gain.
The antenna you show there, is for the N router....and states it works with the WAP54GPE

Also flashing the firmware could help but realize if you have security settings or any settings passwords or any changes you've made to open ports or block ports etc etc, would be lost and would need to be reinputted to work like it was before.
And realize there is a risk involved in flashing the firmware, you could permanently damage your router if misflashed or incorrect versions or .....power surge, spikes, accidentally unplug or shut off the router etc while flashing etc etc...so take extra caution if you choose to go that route.  As flashing may void warranty, I am not 100% positive on that you may want to read the manual or see if linksys will cover such situations if your router is still under warranty.  And if you flash one, you may want to flash both...for the most compatible reasons, but they may be different version numbers so again, make sure you have the right flash for each router.

Wakeup:  I said 4 anntenna, 2 four each wrt54g, as each has 2 posts.

ahhh...duh sorry when I responded I was thinking one router....yes sir 4 would be the way to go... :)

Which brings up the other question...depending on the wireless cards in the computers, you may also be able to get high gain's for those cards as well...if you have make and models of the cards we might be able to see what you can get.  Radio shack also carries some on hand at some stores.....so if you would be looking to get one right away rather than order some over the net, you may try there as well.  CompUSA if you still have one around you...and Fry's electronics carries them too....Maybe Best Buy....

I agree with TsTbB:... Just update the firmware... and turn up the broadcast signals.    Do not go too high default is 28mw it can go up to 250mw.. . If you turnit up too high the signal with be filled with digital noise and you will have more problems...  I run mine at 125mw and it serves my farm well.

Casey

I agree that updating the firmware again may be able to help with the signal, but do again realize you run the risk of damaging or ruining the router if that is done.  So flash firmware wisely.  And you may need to do it to both...just be careful and verify versions and model #'s...revision #'s etc.  Those can be damaging if incorrect versions are used.

Yes you can damage it but I have not had a single problem out of mine since I set it up 2 years ago. The only thing I did was add a cron job to restart it every sunday night a 4am.
Casey