Scott- I got it working now. I used the hack I found. It was much easier than the one you supplied. Here it is:
I used a freeware reg editor to go to the following:
Go to key: HKLM/Services/WirelessMgr (took me awhile to find it as that description is not inclusive)
Find a key called 'MutexFlag'
Change it's value from '1' to '0'
(Note- there was a key called MuteexFlag = '0' as well above it. Not sure what that was but it may have been added by your multiissue hack and not working. I left it alone.)
Then exit out of the editor and I soft rebooted.
When the phone returned, I just tapped on the EV and selected turn on the wifi and this time the Phone remained on. I now have it working with both.
edit noteNote- Also, you can access the on -off of the phone, Blue Tooth and Wifi from that wireless screen as well. It all works with that one little registry change. However, I discovered there may be a priority issue of conflict. It seems that the way to turn on both it to first make the wifi connection with the phone off, then, turn the phone on. When I tried to turn on wifi from that screen with the phone on, it acted like it turned on but remained in EV mode and tried to connect to the internet via EVDO even though the wifi was on. If all you see is a little tower in the screen then I don't believe wifi will work and it reverts to EVDO. If you have wifi connection, ie Tower plus the arrows then it connects via wifi.
I'll be NOT surprised if the battery goes to crap in a hurry with all 3 services active. My main reason, however to have this feature is to be able to access the wifi speed here in the office while sitting in the charging cradle. That way I won't be at a disadvantage like you are now.
I keep the big battery that sticks out the back in all the time. I carry the original spare fully charged and it's mateing cover in my belt pack. I also bought my wife a cradle and USB charging cable for the car and her desk at work. She knows the PDA battery life is a real limitation as compared to her cell phone from before. She caught on fast and now I see she never puts the phone down on a table, she always puts it down in a charging cradle. A good habit but only because she has three charging stations at her disposal. Desk, Kitchen and car. I also bought her a second Treo battery she keeps in her purse. The last thing I want to hear from her is she missed an appointment because her PDA went dead in the field.
"edit" Update- After just 4 hours, having blue tooth, phone and wifi features running, the battery has lost 70% of it's capacity and this is with the large battery option. I can imagine how fast it would be used up with the standard battery. So, as I suspected, the only time you would want to activate wifi and phone and BT for any length of time is when you are powered by external source. Or, just activate the wifi for brief times to download or do some fast web surfing that is definitly faster than the EVDO for long sustained data. The main advantage here is now you don't need to miss a call when you ar4e downloading a file off of wifi. Even with EVDO, you can't take a call and use the EVDO data transfer at the same time so this feature is definitly worth turning on and its just not efficient to use on battery for long periods of time.