I didn’t have to recompile everything, just the C# code (custom filters). Everything else in this version (thanks to Bryan of the XSI list), loaded into 2010 SP1.
Drag to a viewport to install:
RCTOOLS 4.2 for Softimage 2010 SP1
eX-SI
ICE, scripting, and other tech stuff about Softimage aka XSI
eX-SI 
Hey ! Thanks for compiling (and the link to rray.de) !
Don’t work for me in 2011. Can anyone confirmed that rctools works for SI2011? Thanks for any answer.
Hi!
Can some body help me, please!
I get in XSI 2010_sp1 error:
// ERROR : Object expected – [line 124 in C:\Users\Rafael\Autodesk\Softimage_2010_SP1\Addons\RCTools\Application\Plugins\rcPopupPlugin.js]
// ERROR : 2006-CUST-rcPopup – Unexpected failure.
rcPopup();
I don’t know what to do whit it.
ERROR : 2424 – XSI failed to load a .NET plug-in. This error happens because the plug-in may have been compiled with a different version of XSI. Recompile the plug-in with the current version of XSI to fix the problem.
C:\Users\Ramon\Autodesk\Softimage_2011\Addons\RCTools\Application\Plugins\rcCustomFilters.dll>
Softimage crash on a half comand of Rctools
Yeah, 2011 SP1 would be gr8!
https://xsisupport.wordpress.com/2010/06/23/rctools-compiled-for-64-bit-softimage-2011/