Multiple Questions

[Nick B]

hello, i've got multiple questions..

1) I'm running Debian Sarge,  currently im using 1.02-4 (stable deb package) 
I need the sql_counter mod installed , is their anyway of installing it 
without reinstalling Freerad?
    I had removed freeradius 1.02-4 and went to install 1.0.5 via source but 
during make / make install came up with errors (that i cant remember).  ( i 
was using the experimental flag )

2)  Is there a way of setting up some sort of Redundancy i.e. having 2 
radius servers if one drops all authentication will go to the next radius 
server (MySQL backend).  I was thinking maybe have a DB server and have the 
2 radius servers using that one DB server.. At this point im Not sure which 
AP's / Router(s) the company is using (wireless enviroment).

3) How would I setup freeradius to have MAC address authentication via SQL 
if verified they would have inet access if rejected they wouldnt. Im not 
sure as to what settings are required in the Users  table i.e. compression / 
type of user framed etc or what not or how they would automatically obtain 
an IP# / internet access  via dhcp if / when their authentication was 
accepted. ( im using dialup admin for entering in nas  / user info )

My mind is at a blank atm but im sure ill have many more questions.  I've 
read the documentationa and unfortunatly some of it made lil to no sense to 
me or the documentation was vague at best.
Last radius server i used was a Macintosh based  GUI for dialup customers 2 
clicks and i was done so to speak :)...

4) what settings if any would i have to enter into a router (yes i know 
another silly question that i dont know the answer to)

Once again Thanks for any and all help/support :)

Nick B.
Newb to Freeradius / Radius in general.
B&C Technologies.