Ok, so there is a really cool MineCraft launcher called DIGIEX. What this launcher allows you to do Is switch between updates so if you are playing 1.2.3 and you want to see what alpha 1.0.0 was like you can simply download it from Digiex and play it! Or if you want to get and mod for 1.1 that Hasn't updated yet, you can download that version of MineCraft and Yay! for example the Yogbox. Here's the link to the WebSite..
digiex.net/content/
And here's a link to a the very cool mod pack I said The YogBox!...
www.modloader.com/the-yogbox-mod/
P.S You can get the version of the YoBox for 1.1 but it doesn't have Tale of kingdoms mod that pretty much brings the YogBox together (In my opinion). Thanks for reading!
P.P.S I DID NOT MAKE ANY OF THIS STUFF If you want a pic or something just ask.