Since I've never set up a feed, I'll leave that to someone else to answer; however, our Wiki has the following link that would appear, at least at first blush, to be a place to start...
(Anything in blue is a link)
http://www33.websamba.com/cnmsales/o...0tutorial.html
However, as to Sacramento - our database has the following entry;
http://www.radioreference.com/module...me=RR&sid=4499
See where it says 'system voice' - it mentions both APCO25 and Analog - therefore this system is running what is sometimes referred to as 'Mixed Mode'. This means that both analog and digital talkgroups are found on this system. It looks like the Fire/EMS stuff is all analog (Mode A). There are some Police/Maint units that are digital (Mode D)
If all you're interested in is fire/ems, then one of the analog only scanners (or older trunktracker such as the BC796 from Uniden) will serve you well. This scanner will be supported when the rebanding issues hit the West Coast, and will do both analog and digital trunking. Of course, there's also the new BCD996, as well as the RS/GRE PRO-96 and 2096, the only 2 GRE Digital scanners.
Your best bet is to talk with other California scannists on that forum - in addition I'm sure there are 1 or 2 at least Sacramento related Yahoo email scanning reflectors. Your best bet is education - learn what others are using.
Our Wiki has extensive pages with reviews and much more on most of the trunktrackers out there. Be sure to use that in your research.
73s and GL...Mike