Intel IPP is now available as standalone, also Intel IPP is available as a component of Intel Parallel Studio 2011, Intel Parallel Composer 2011, Intel Parallel Studio XE 2011, Intel Composer XE 2011, and Intel C++ Composer XE 2011.
To get an evaluation copy click this link - http://software.intel.com/en-us/articles/intel-software-evaluation-center/
Then you can choose IA32 or Intel 64 binaries.
If you want particularly 6.1, then choose 'Release version' as 6.1 in the registration centre (Select other packages from the dropdown menu option). You can see thisin the bottom of registration centre package options.