[Captivate Q&A, Help & Troubleshooting] goob1284:
This belongs to this thread: http://xdaforums.com/showthread.php?t=1324831

Sorry if I do not mention every problem in this thread, for there is a lot that can go wrong! If there are any further questions, please feel free to ask. Also, I am not responsible if anything goes wrong, obviously you have a choice to install this ROM. Finally, I am not a dev, I wish I was though. If I have crossed some boundaries, please let me know, I'm sorry this is my first major post. So help me, to help you!;)

Here is how to install and also get 3G working, don't complain, I tried.

If there are any questions, again, ask.

First, get this ODIN one click, http://xdaforums.com/showthread.php?t=731989 , thank you DG, you are a stud. Download the latest Nightly ,http://download.cyanogenmod.com/?device=captivatemtd , (I used 181). Grab the attached update.zip as well, this will be your CWM, to access it, use the 3 button method to get to recovery (press volume up and down, plus the power. release the power button when you see the ATT logo). Lastly, download Alpha 6, along with the Enable 3g zip and the superuser zip. Put nightly 181, the Alpha 6.zip, superuser.zip, update.zip, and the Enable 3g. zip on your sdcard.

Basic Outline of what needs to be done for original Alpha 6:

Download all the .zip's and the odin. Install drivers, and open up the ODIN.

Put the 4 zip's (Nightly 181, Alpha 6, Enable 3g, and update) on the root of your SDcard.

Open ODIN, and enter download mode on your phone. Connect your phone to your computer.

Press start on ODIN, and let it work.

Once the phone reboots, enter recovery mode. Choose reintsall packages, or install update.zip, whichever is there.

The phone will come back to that same recovery, choose reinstall packages or install update.zip again.

Choose install zip from SDcard, then choose zip form SDcard, and pick the cm7 nightly 181. Let that install.

Once CM7 is intalled, go back to recovery. Choose install zip from SDcard, then choose zip from sdcard, and install Alpha 6. You may have to repeat this step.

Go back into recovery, select install zip from SDcard, choose zip form SDcard, install the superuser.zip. Reboot the phone.

Once booted, log into you Google account, and download Script Manager.

Press the Menu soft key, System Settings, More..., Mobile Networks, Access Point Names, Menu soft key, New APN, Select Name and enter ATT WAP, then select APN and enter wap.cingular, Menu soft key and select save.

Reboot into recovery, install zip from SDcard, choose zip from SDcard, select the Enable 3g.zip, install.

Reboot the phone, open Script Manager.

Select the folder ".." twice (it should be the top folder), your now at the root folder, select etc, then init.d, select 99enable3g. Make sure "Run as root", "Run at boot", and "Run on net.change" are selected. Press save.

Reboot and it should work! Questions? Concerns? Let me know!

Basic Outline of what needs to be done for the Alpha 6 with Hardware Acceleration:

This is optional, but I went back to stock. You need the JF6 like before as well as the update.zip and the Alpha 6HW2D.zip on the SDcard.

Flash back to stock.*

Once finished going back to stock, go into recovery and reinstall packages. Let it reboot and select reinstall packages again.

First, do delete all user data and cache. It works.

Select install zip from SDcard, then choose zip from SDcard.

Select Alpha 6HW2D.zip. Let it complete. Then go back into recovery and repeat. It must be flashed twice.

TADA! let it boot and you should be good to go!

I will be adding more to this, but it will take some time. Thank you.