This is a very informative post
[Only registered and activated users can see links. ]
I don't think I've seen one better for the basic flash, it covers how to get the pc to read the phone to loading the PRL and even points to how to get WAP working.

Like I mentioned there are many ways.

I use CDMA Work shop 3.6 and windows XP.
Connect just like in the tutorial,
do the spc in the security tab,
do the PRL in the misc tab,
do the EVDO setting,
do the NAM setting.
then I root the phone,
root procedures can be found amoung the many threads here and also at sdx-developers.com
then I load the u2nl, autostart.apk, and autostart.sh - these you can find at [Only registered and activated users can see links. ].
If you're not in an AWS market, have the correct PRL, the ESN is on the account, you should be good to go.