Update docs

README.md

@@ -2,7 +2,7 @@
    <img alt="TR Rando" src="Resources/randomizerlogo.png"/>
 </p>
 
-TR Rando is a randomizer tool for the classic Tomb Raider series (TR 1-3). It allows you to change many aspects of the
+TR Rando is a randomizer tool for the classic Tomb Raider series (TR 1-3 and Unfinished Business). It allows you to change many aspects of the
 original levels, such as item pickups, secrets, enemies, Lara's appearance, level order, text...[and so much more](#features).
 
 ## Installation

USING.md

@@ -12,6 +12,8 @@ Before you launch the randomizer for the first time, you should carry out a few
 ***
 > ### TR1
 > You must use [TR1X](https://github.com/LostArtefacts/TR1X) to be able to randomize Tomb Raider 1. Follow the installation guide on the TR1X GitHub page, or you can also refer to [this video](https://www.youtube.com/watch?v=WfyHin4Hpgs) for guidance. Note that if using the TR1X installer, the default directory where your game will be located is your Documents folder as opposed to the base game folder.
+> 
+> You must also ensure that you have the Unfinished Business levels files in your installation. These are available when using the TR1X installer, and we recommend that you choose the set that contains music triggers. The level files are also available to download manually from https://lostartefacts.dev/aux/tr1x/trub-music.zip - you can then simply extract the files into your TR1X data folder.
 ***
 > ### TR2
 > Use the [Version Swapper](https://github.com/TombRunners/tr2-version-swapper) or install and configure [TR2Main](https://github.com/Arsunt/TR2Main).