Haha, sorry, I'm 30 minutes late
. I think I can probably help you. I don't use CM, but the principles should all be the same:
1) I'm 98% sure you can flash the radios while on CM, BUT if I were you I would flash a sense ROM, first, reboot, then go back to recovery for the radios. The reason I say this is because you will want to update both PRL and Profile after, and both should be done from a sense ROM. Pick any old sense ROM you want. No need to restore anything to it. You should, however, stick with a 3.70-based ROM as you suspected. After you reboot, if you are on anything older a) there's a good chance it won't even boot with a stock HTC kernel and b) PRI 1.90 should not be flashed with an older ROM even if you have a different kernel. Save yourself the trouble and stick with 3.70.
2) I flashed the combo update, but I like to live dangerously like that
. Honestly, it's pretty much debatable. Some say to do one at a time, some don't. If you do one at a time, you give yourself the benefit of know which update caused a problem if you run into any. However, if you do the combo update and have a problem, you can downgrade one at a time, starting with PRI. I do remember reading somewhere that 0003 Evos had issues with the combo update. I have a 0003 phone, and it's fine. Take that with a grain of salt.
3) Ok, so, first of all, I'm pretty sure you have RA, right? I'd stick with RA for it if I were you. I have not good reason for this other than I've heard other people I trust say you should, and it's what I did. What you do is flash the zip from recovery like anything else. If you're going to do the combo update, it's just one flash. If you do them separately, you can boot up in between, but you should start with baseband if you do. You'll probably see some instability if you start with the others. It's not that you'll permanently break something by flashing them out of order. It's that 3.70 and the HTC #15 kernel require the new radio to work right.
So, the flash process is a little different. Once the radio flash is done, it will prompt you to reboot. When it does, it will pop up with a black screen and green down arrow. It might stay there for several minutes. Don't panic. Don't touch anything. It will reboot when it's done. Once it does, it will dump you back into recovery. From there, reboot normally, and make sure the system is stable. Once you are done with all the radio update, update both your PRL and Profile. I trust you know how to do that.
4) Once you're done with that, go ahead and restore your nandroid backup of CM. Of course, if you had to switch recoveries to RA, switch back first. I don't know why I'm tell you that. I know you know the basics
.
4) It's always better to ask questions and know exactly what you're doing before you pull the trigger. I was pretty nervous about doing it, too, before I did. I totally freaked out when it sat at the black screen for a few minutes. For whatever reason, there is no step by step guide for this that explained that.
Ok, so I was 30 minutes late when I started writing this. Now I'm 45 minutes late. Oh, well
. I hope this helps.
EDIT: haha, you guys had a nice little conversation while I typed all this out. Yeah, I forgot the obvious step of going to about software information and verifying the radios updated. Also, another thing you should definitely do first is backup your wimax RSA keys. Also, in as sense ROM, as root, in terminal, run wimax_mtd. It will show your current wimax version, mac address, and run some tests. Do this before and after the wimax raido update. Also, of course, do the normal check for your RSA keys after, as well. More than likely, though, if your RSA keys got wiped out, wimax_mtd won't run right.
