[myTouch 3G Slide Q&A, Help & Troubleshooting] javolin13:
Okay, this is for anyone like me, who may not have had success with steps after the root process, IE: ENG build.

Story: When in the rooting process, you get all the way to the point of being ready to flash ENG build, and copying flash_image, and mtd0.img is unsuccessful via ADB.

When rooting the Slide, part of the process is being able to have ADB see the device when in HBOOT or Recovery, by placing the phone in a "Charge only" mode. HOWEVER if you've flashed Froyo before completing the ENG build or any version of builds that do not have the "Charge Only" option, you may find yourself in a pickle.

Don't sweat it. Here's what I did to be able to completely root and have clockwork recovery without having to flash OTA.zip and the Update.zip file to gain access.

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First you will want to have the ESPRIMG.zip file downloaded

The clockwork update.zip and Also have the Root.zip package downloaded

(Both of these files can be located within the how to flash "ENG Build")

Now do a backup of all the data on your SD Card, then do a FRESH format FAT32 on the SD Card, this will make sure you have no issues of your device not seeing the "ESPRIMG.zip" file.

Once the SD Card is formatted, upload the contents of root.zip, and the whole ESPRIMG.zip file to the root directory of your SD Card (Not in a file, and do not place any of your SD Card backup, back onto the card just yet)

Now, while your phone is booted up and you're running, go to the Marked and download the "Terminal Emulator", do not use the emulator pre-installed (it does not support soft keyboard(that i know of), and the hard keyboard doesn't have the keys you need)

Now once you've downloaded the emulator and launched it, press menu and press Soft Keyboard, once you have the keyboard up;

You should see $

type su (check your phone, you may need to hit always allow if the Superuser permissions menu pops up)

Now you should see #, after every line hit enter, and you should see # (that means the command was successful)

type
cat /sdcard/flash_image > /data/local/flash_image
cat /sdcard/mtd0.img > /data/local/mtd0.img

cd /data/local/
chmod 04755 *
/data/local/flash_image misc /data/local/mtd0.img

Once you have completed typing that, those files will be moved and copied to /data/local.

Now shut down your phone (not reboot)

Press Volume down + Power to boot into HBOOT

Your device will now start to locate ESPRIMG.zip, once it finds it, you will let it load up, then press VOLUME UP to install.

DO NOT SHUT OFF YOUR PHONE, if so you may brick it.

Once you have successfully flashed ESPRIMG.zip your phone will reboot (if not, reboot it yourself) Then it will finish the install.

You're now finished with the process of ESPRIMG, now you can grab the clockwork update.zip and copy it to your SD Card, then every time you reboot, just boot to HBOOT, go to recovery and flash the clockwork update.zip, and flash your ROM.

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ADB not being seen with froyo is not an issue strictly with froyo, but an issue with an incomplete root, then a flash of froyo.

Once you've done the above and flashed a working froyo rom, just make sure debugging is on, and your device should be seen all the time, as long as ADB, and the SDK are properly installed.

*If you follow these steps you should not brick your phone, if you do brick your phone, remember no one held a gun to your head and said do it, i'm not responsible... yada yada.. *

good luck! :)