[myTouch 4G Themes and Apps] VolcanicSkunk:
Before we get started, here's the usual.... I am not responsible for anything that happens to your phone. Period. Do this at your own risk.

TrueBlue_Drew has made this very easy! Just follow this link to view his thread for automated converting and flashing. There are a couple of other methods to flash these as well. Keep scrolling to find instructions on flashing through fastboot or through terminal.

Requirements to Flash Through Fastboot:

Rooted MT4G/G2

ADB and Fastboot

Engineering HBOOT!!!! (This is important! You need the ability to flash with fastboot in order to use this! If you don't know what fastboot is I would not recommend doing this! Fastboot can be risky!)

Since we got the ability to flash custom splash screens I went and flashed an N1 splash screen. I wanted a little myTouch flavor added in, so I took a little time and this is what I came up with.

I also got a request for a plain HTC splash screen, so those just got added in. I'm going to try to keep new ones coming. If you find an image that you really like and don't know how to convert it, just post it and I'll convert it when I get a chance (must be 480x800).

INSTRUCTIONS:

Just unzip the contents of the zip file to the tools folder of your AndroidSDK (or wherever you have fastboot installed).

Plug your phone into the computer (Debugging enabled of course)

Open a command window

Type adb devices to make sure your computer recognizes the device

cd to the folder where you have fastboot and the splash screen .img

Type adb reboot bootloader

Your screen should say fastboot, not Hboot. If it says Hboot, manually scroll down and switch to fastboot mode.

Once in the fastboot bootloader type fastboot devices to make sure your computer recognizes the device

Type fastboot flash splash1 nexuscustom.img

It will say okay twice

Then type fastboot reboot

Stare at your brand new splash screen!

Requirements to Flash Through Terminal Emulator (THANK YOU TrueBlue_Drew!):

Rooted with S=OFF

Terminal Emulator

Fingers

Thanks to QTeknology for his original post with his Nexus One splash screen I used. Also, a most important thank you to reukiodo for his guide to creating/installing the splash screens which you can find here if you'd like to make your own.

Almost forgot.... Nandroid cannot restore the stock splash screen! This is a permanent change! If you want to return to stock splash you will have to flash stock .img. The original splash screen .img is here as well if anyone needs to return their phone for a warranty.

The next post contains the downloads. All splash screens are split between the two zip files to save space.

With each of the HTC splash screens, there are smaller versions of each.

These splash screens were originally made by JSZESZE for the Evo 4G. I stumbled across them and thought that they would look awesome on our phones! Huge thanks to JSZESZE for allowing me to post these here! If you have any friends with an Evo, they can get their copies by following this link.

I have a lot of colors up in post# 349: Blue, Green, Orange, Pink, Purple, Red, White, and Yellow. If you want a different color just ask. I should be able to make any color for you. If you want an exact color, please provide the Hex value.

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Find the Apple Killers in post# 334:

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Post# 337:

Check out post 73 for a couple of personal requests.

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These are a Cyanogen colored version of the myTouch 4G splash screens that were requested by jdkoren. Just click the pictures to get to the post with the downloads.

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Then these two were made by other members and look fantastic!

jbrew78 made this one:

and this one by UntamedDeviance:

Untamed Deviance has a thread with a whole bunch of awesome splash screens. Check them out here. He even does requests! Huge thumbs up!