Hello all, Just to introduce myself: I've been using WPI since version 3.x -- and it is AWESOME! I've been trying to use WPI to install language pack under Windows 7 64-bit. The commandline I use is: lpksetup /i ru-RU /p <PathToMUIfiles> and it works fine when I input them manually . But when I run the command from WPI it just errors out and WPI contiunes to the end with no other problems.... For testing I try to run lpksetup with no parameters which should result in the language pack GUI popping up. Things i tried which resulted in errors (I added a PAUSE to see what the error is): (-) 'cmd /c lpksetup.exe' (-) 'InstallMUI.cmd' WPI runs it in a 32-bit CMD window (%windir%\SysWow64\cmd.exe) and errors out to "... is not recognized as an internal or extended command, operable program or batch file." Seeing that the problem might be CMD under 32-bits I tried: (-) using the above with bit64=yes (-) '%windir%\\system32\\cmd.exe /c lpksetup.exe' (-) '%windir%\\system32\\cmd.exe InstallMUI.cmd' They all run in %windir%\system32\cmd.exe but I get the same error. (*) I also used other permutations, like, defining the full path to lpksetup. (*) Substituting 'winver' (instead of lpksetup) works with every permutation. I did a search but it came up with 0 results. Please help... Thanks, David