Okay so I've searched for a long time and I'm not really finding any good information to solve this, so I'm posting here. I hope that's okay.
I'm in an awkward situation where I still play on a 1.5.2 server, but also want to play on a 1.6.2 server that requires Forge. I have no idea how Minecraft currently handles separate installs. My bin folder contains my 1.5.2 jar and if I just use the old launcher it works fine. To also use 1.6.2 I decided to download Magic Launcher and select 1.6.2 there. Both of these work, if I want to play 1.5.2 I use the old launcher, if I want to play 1.6.2 I use Magic Launcher.
The problem I'm running into right now is that I need to install Forge for my 1.6.2 jar (wherever that is) to try out a new server. If I run the Forge installer, it attempts to install the latest version of Forge to my 1.5.2 jar. I've tried to find the mysterious 1.6.2 jar that I must be running from somewhere, so that I can direct Forge to install there, but I'm having a hard time.
Thanks.