Setting up WiFi for work, Need some tips.

[shoju]

Ok Lurkers,

My business is coming into the digital age, slowly, but surely. We are looking to add wireless for our departments, to help make getting stuff in, checked in, and on the floor faster.

Here's the problem. This is an OLD building.

So, I'm hoping someone here can recommend me the following:

Good, Wireless Router. Fairly secure, but doesn't need to be sonicwall type. Just something that I can lock down some stuff on, would be nice.

And then, I need help. What do you use to boost the signal?

Do I just need some of these? Is there a better brand out there?

And how many of those can I use together? I'm probably going to need.

Service Counter Area
Blade Room
Maintenance
Auto
Tires
Military
Housewares

7? of them, just to make sure I'm getting around all of the walls / concrete/ rebar / blast doors / etc... this place is an old factory that made Military Pieces and parts, not limited to can openers, and M16 Magazines / Parts, so i have some serious "stuff" in my way.

Also, woudl those just "work" with an existing Sonic Wall Wireless Network? I'm curious if I can bypass purchasing another router, and just use what I have in the SOnicWall, and make it all flow. It would certainly make my life a lot easier if that were the case.