Download and run SourceTreePortable_0.0.1_Development_test_1.paf.exe
#####Getting Atlassian SourceTree
Download SourceTreeSetup_1.6.12.exe
To extract files from SourceTreeSetup_1.6.12.exe file at the command line, type:
SourceTreeSetup_1.6.12.exe /extract msiexec /a SourceTreeSetup_1.6.12.msi /qb TARGETDIR="%temp%\SourceTree" xcopy "%temp%\SourceTree" "drive\PortableApps\SourceTreePortable\App\SourceTree" /S rmdir "%temp%\SourceTree" /S