When I go to drag phoenix.tns to the calc it says "wrong handheld type for the os being sent."  Plus it is labelled as phoenix.tns.tcc. I seem to be doing everything as described in theascen's post. Any help is appreciated.

pls try to my guide...Try...and try...

How to downgrade Ti-Nspire CX 3.6 (Non CAS)  to 3.2 CAS O.S

Current:
- Ti-Nspire CX 3.6 (non CAS)
Now, You want to downgrade Ti-Nspire CX CAS 3.2. Ok!

Step 1: Download [ nLaunchy 3.2/3.6 switching pack ]
Link: http://tiplanet.org/forum/viewtopic.php?f=57&t=13213

Extract: NL_3.2-3.6_switchpack\TI-Nspire CX\ndless
- Send : the  [ndless] folder =>>> Ti Calculator
- On Ti Calc / Open [ My Documents ] //// you see   [ndless] folder.  pess Enter 'ndless_installer' and then [ Y ]
After that, press [ 2] and [ 2 ] ....and [ 0 ] to complete installation.
Exit


Step 2: Download ROM 3.2 Ti-Nspire CX CAS
- Run file: TNOC_en.exe  Link: http://tiplanet.org/forum/archives_voir.php?id=1922&short=1
check Delete boot2
- Rename new file: TI-NspireCXCAS-3.2.3.1233_b.tcc to [ phoenix.tns ]- Copy file:  phoenix.tns to [ NL_3.2-3.6_switchpack\TI-Nspire CX\non-CAS\nlaunch ] on PC.......overwrite
- Copy [ nlaunch ] folder in [ NL_3.2-3.6_switchpack\TI-Nspire CX\non-CAS\nlaunch ] to Ti Calculator
- Press [ Reset ] button back: Operating system not found. Install now.
- Connect and copy file:  nlaunch.tco  in ( NL_3.2-3.6_switchpack\TI-Nspire CX ) on PC. It will reboot

Waiting and using

Note:
If there're troubles. You should do:
1.  Press and Hold (4 keys): Doc + Enter + Ee and Release [Reset] Button
[ 2 ] and [ 1 ] ....and then [Enter]
You can install new OS

2. With fail belong to NSC MP V4 Diag. You can do:
Press and Hold (4keys): Esc + Menu+-and Release [Reset] Button to disable diag test

3. Everything...You can do:
Release [ Battery rechagreable ] about 3 - 5 second to clear fail


Thanks!
I'm from Vietnam. So i don't write Ennglish well. Sorry!
You can send my Email: [email protected]

Moderator note: The following tutorial may brick your calculator and has been reported to leave out important information. Proceed at your own risk

How to downgrade Ti-Nspire CX 3.6 (Non CAS)  to 3.2 CAS O.S

Current:
- Ti-Nspire CX 3.6 (non CAS)
Now, You want to downgrade Ti-Nspire CX CAS 3.2. Ok!

Step 1: Download [ nLaunchy 3.2/3.6 switching pack ]
Link: http://tiplanet.org/forum/viewtopic.php?f=57&t=13213

Extract: NL_3.2-3.6_switchpack\TI-Nspire CX\ndless
- Send : the  [ndless] folder =>>> Ti Calculator
- On Ti Calc / Open [ My Documents ] //// you see   [ndless] folder.  pess Enter 'ndless_installer' and then [ Y ]
After that, press [ 2] and [ 2 ] ....and [ 0 ] to complete installation.
Exit


Step 2: Download ROM 3.2 Ti-Nspire CX CAS
- Run file: TNOC_en.exe  Link download: http://tiplanet.org/forum/archives_voir.php?id=1922&short=1
check Delete boot2
- Rename new file: TI-NspireCXCAS-3.2.3.1233_b.tcc to [ phoenix.tns ]- Copy file:  phoenix.tns to [ NL_3.2-3.6_switchpack\TI-Nspire CX\non-CAS\nlaunch ] on PC.......overwrite
- Copy [ nlaunch ] folder in [ NL_3.2-3.6_switchpack\TI-Nspire CX\non-CAS\nlaunch ] to Ti Calculator
- Press [ Reset ] button back: Operating system not found. Install now.
- Connect and copy file:  nlaunch.tco  in ( NL_3.2-3.6_switchpack\TI-Nspire CX ) on PC. It will reboot

Waiting and using

Note:
If there're troubles. You should do:
1.  Press and Hold (4 keys): Doc + Enter + Ee and Release [Reset] Button
[ 2 ] and [ 1 ] ....and then [Enter]
You can install new OS

2. With fail belong to NSC MP V4 Diag. You can do:
Press and Hold (4keys): Esc + Menu+-and Release [Reset] Button to disable diag test

3. Everything...You can do:
Release [ Battery rechagreable ] about 3 - 5 second to clear fail


Thanks!
I'm from Vietnam. So i don't write Ennglish well. Sorry!
You can send my Email: [email protected]