The latest version of this pack can just about always be found here: http://www.minecraftforum.net/viewtopic.php?f=1021&t=171726

An alternative texture pack that's a lot like Strongestcraft, but without the x-ray aspects, is Assistcraft, great for general use! If you love using the default texture pack, you'll love Assistcraft even more! http://www.minecraftforum.net/topic/372683-16x173assistcraftupdated-7-31-1130-am-cdt/

If you didn't already know, equipping a pumpkin as a helmet with this texture pack will activate night vision! Try it and see for yourself!

How to install:

For Windows XP users:
1: Go to C:\document and settings\[Your Name]\Application Data\.minecraft\texturepacks
2: Cut this entire .zip folder to the texturepacks folder under .minecraft. Make sure that you DON'T extract the files! Again, you're NOT supposed to remove the files from this .zip folder! Cut the ENTIRE FOLDER and paste it into the above location.
3: Close the folder, start up the game, log in.
4: Under "Mods & Texture Packs," select this texture pack, then click "Done."
5: Enjoy!


For Windows Vista/7 users:
1: Go to C:\Users\[Your Name]\AppData\Roaming\.minecraft\texturepacks
2: Cut this entire .zip folder to the texturepacks folder under .minecraft. Make sure that you DON'T extract the files! Again, you're NOT supposed to remove the files from this .zip folder! Cut the ENTIRE FOLDER and paste it into the above location.
3: Close the folder, start up the game, log in.
4: Under "Mods & Texture Packs," select this texture pack, then click "Done."
5: Enjoy!


For Mac users:
1: Follow the steps in this guide.
http://www.minecraftforum.net/viewtopic.php?f=25&t=40207
2: Alternatively, here are different instructions from another mac owner! "What you have to do is compress all the items inside the folder, not the folder itself, so navigate to the Strongestcraft folder but DON'T zip it, go into it and zip all of the items inside it. To do this, just highlight all the files and folders inside it, right click any of them and click "Compress 29 items" (I think that's how many, but if not it's close.) Finally, just put that zipped folder into the "texturepacks" folder in your minecraft folder, hope I could help."
3: Enjoy!