There is a mod somewhere that reverts the game back and forth between versions that I had heard mentioned once. I just can't figure out what it was called right now to have a better chance of hitting the thread in search. :sad.gif:
I don't believe it did it with .jars either, it was something more complicated so you had to have a preexisting version for it to work from what I was told about it, and I think it let you go as far back as Alpha, so you could experience every update from start to latest and understand the overall development/progress of the game over time.
Quote from deathsknight13
i have 1.7.3 i just need the the mods
Oh, well that is just as easy as hitting the search bar, finding the threads for each mod, and seeing if they have the old versions posted, as there are others like you who still play 1.7.3 or went back after messing around to see the changes in 1.8 and 1.9 and decided that 1.7.3 was 'it' for them, for now.
If they don't have it, then I'd suggest asking them to post links to old versions in their threads so both you and anyone else who wants those old versions can obtain them freely.