On July 5th that night i did the horse update and was able to play all night. I tried the next morning to add Rei's minimap mod. I opened up minecraft.jar and Rei's 1.6.1 both with winrar. I took Rei's files and added them to minecraft.jar, and it never worked. Then the launcher wouldn't let me play. The log in button was lit and the play button was unclickable. I kept trying and failing, so i deleted the rei's files from minecraft.jar and attempted to play, still didn't work. I tried deleting and re-downloading the launcher many times, till no luck.

Here's a copy of my Development Console:

Launcher 1.0.8 (through bootstrap 4) started on windows...
System.getProperty('os.name') == 'Windows 7'
System.getProperty('os.version') == '6.1'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.7.0_05'
System.getProperty('java.vendor') == 'Oracle Corporation'
Going to log in with legacy stored username & password...
Loaded 3 profile(s); selected 'ItsDaniely0'
Unexpected exception refreshing version list
java.lang.IllegalArgumentException: Version '1.6.1' is already tracked
at net.minecraft.launcher.updater.VersionList.addVersion(VersionList.java:91)
at net.minecraft.launcher.updater.LocalVersionList.refreshVersions(LocalVersionList.java:44)
at net.minecraft.launcher.updater.VersionManager.refreshVersions(VersionManager.java:47)
at net.minecraft.launcher.Launcher$2.run(Launcher.java:164)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Trying to log in...
Logging in with access token
Logged in successfully
Delta time to compare resources: 6469 ms
Download job 'Resources' skipped as there are no files to download
Job 'Resources' finished successfully
Invalidating accessToken with server...
Going to log in with legacy stored username & password...
Trying to log in...
Logging in with username & password
Logged in successfully
Invalidating accessToken with server...
Going to log in with legacy stored username & password...
Trying to log in...
Logging in with username & password
Logged in successfully

Help would be very appreciated.