[Acer Iconia Tab A100] pio_masaki:
As I wrote the guide I realized the files, scripts, and images are scattered through multiple threads, which makes finding what you need difficult, even from a main thread (the guide for example). This was compounded even more when I was writing the CM9 Install Guide for the CyanogenMod Wiki and listed the commands themselves, it became huge, intimidating, and looks extremely daunting, I can only imagine what a new flasher must think seeing it! And and so I decided perhaps I can fix this, and with that I present to you...

The A100 Flashing Toolkit!

What is it?

A single zip file that, when unzipped, contains EVERYTHING you need, ADB, fastboot, scripts, CWM recovery image, everything you need to take your stock ICS A100 through rooting, unlocking the bootloader, and flashing CWM recovery (twrp coming soon)!

How is it used?

Its a set of 6 PC scripts, 3 for windows users (.bat) and 3 for linux users (.sh). Run in order from the same folder, and you can just click and run, reboot, click and run, reboot, click and run, install custom rom, done!

You MUST already be on ICS! This is not for HC, if you are on HC update to ICS FIRST!

Instructions

Make sure you are on ICS! Read the bold red letters above! You have been warned! You should already have installed the Acer USB drivers for ADB to work.

Ok, now you're on ICS....right?

Download and unzip the file to whatever folder you can remember, for example c:\acer or ~/acer.

Open your file manager of choice and browse on over to where you unzipped the files, and get ready.

Windows

Right click on A100-root-win.bat and select Run as Adminitrator.

Once that is finished, let your tablet reboot.

Once it's rebooted, right click on A100-unlock-win.bat and select Run as Administrator.

Once this finishes, let the tablet reboot again (the script will tell you what's happening)

Once it's rebooted, right click on A100-recovery-win.bat and select Run as Administrator.

Allow it to finish, it'll reboot a couple times.

Half the time it reboots into recovery, other reboots into system, not sure why it happens.

If it boots into recovery, go ahead and make a full backup, might as well.

If it boots into system, reboot into recovery and make a full backup, might as well.

At this point, you can now wipe and install a custom ROM, see the A100 Guide in General for ROMs and instructions on this.

Linux

Execute A100-root-linux.sh and allow it to run.

Once that is finished, allow tablet to reboot.

Exectute A100-unlock-linux.sh and allow it to run.

Let the tablet reboot

Execute A100-recovery-linux.sh and allow it to run.

It'll either reboot into recovery, or system, it does one or the other for some reason.

If rebooted into recovery, make a full backup.

If rebooted into system, reboot into recovery and make a full backup.

Wipe and install a new custom ROM, see the A100 Guide in General for ROMs and instructions on this.

How to boot into recovery

There's a few ways, 1 way is an app like quick boot, you can use adb by typing adb reboot recovery or you can do it manually.

Power off the tablet.

Press and hold the volume - button, closest to power and lock switch.

Holding volume - press and hold Power.

Hold until the screen says Booting recovery kernel then let go.

You should be in recovery, either CWM, TWRP, or stock, whatever you have installed.

As always I am open to suggestions, advice, or reports! Feel free to post up or PM me with any issues, questions, bugs, or ideas!

Download

A100 Flash Toolkit 1.1 7-16-12

Now featuring the correct bootloader!

Thanks to smokku for pointing this out.

Who do we thank for this package?

ZeroNull: Alot of the scripting is based on his work, and borrows his ADB and fastboot executables.

ptesmoke: Uses his CWM recovery.img file

CyanogenMod Iconia Team: For allowing me the chance to write for the Wiki, and realizing this NEEDED to be done.

Anyone else I'm forgetting, I'm sorry I will add you as soon as I remember (feel free to drop me a note!)