What you will need
- (unencrypted) XAP of app you are replacing the splash and tiles
- replacement splash and tiles
- Windows 7 or Windows 8 Pro
- Windows Phone SDK
- Windows Phone PowerTools (for XAP "Update" feature.) (Optional)
- Zune for Windows
Take the xap that we will be changing (WP7Root Tools for the sake of this tutorial) and open it in WinRAR
(you can use "open with..." or you can even do as I did and set WinRAR as the default handler for XAP files.)
WinRAR will proceed to open it as a zip file
Open the folder where the (extracted) replacement splash images are contained and highlight them, then click copy or press ctrl + c
(Note: Filenames may vary depending on the App. Programs built for 7.8 and up may have slightly different names from those for 7.5)
Go back into WinRAR. Press Ctrl + V or click "Paste file from clipboard" from the FILE menu
Close WinRAR and open Zune.
Then connect your phone, wait for it to register in Zune, then open *
Windows Phone Power Tools.
In Power Tools, click "Connect"
Then in the area where there is a text box with "XAP Path" above it, there will be a "browse" button beside it. Click it.
Select your XAP that we replaced the icons and splash for previously.
then click "Update"
And when its finished you have now refreshed the look of the tiles and splash screen of your app!
*Note: Power tools is unnecessary. you can sideload like normal, but at times at the expense of your data for the app.