Below is my unit test step (GALLIO_3_3_458 is a Jenkins environment variable pointing to the gallio installation folder).
Note the trick to keep the Gallio exit code if one of the two test runs fails.
rem @echo off
echo Running "normal" tests
call %TYPEMOCK_7_2%\mocking_off.bat
set GALLIO_ECHO_CMD=%GALLIO_3_3_458%\bin\Gallio.Echo.exe SirdasTest\bin\Release\SirdasTest.dll /rd:TestReports /rt:xml /v:Verbose
%GALLIO_ECHO_CMD% /rnf:SirdasTests /f:"exclude Category:Isolator"
set ERROR=%ERRORLEVEL%
echo Running tests with isolator
call %TYPEMOCK_7_2%\mocking_on.bat
%GALLIO_ECHO_CMD% /rnf:SirdasIsolatorTests /f:"include Category:Isolator"
IF %ERRORLEVEL% NEQ 0 set ERROR=%ERRORLEVEL%
echo Formatting test results into html
%GALLIO_3_3_458%\bin\Gallio.Utility.exe MergeReports TestReports/SirdasTests.xml, TestReports/SirdasIsolatorTests.xml /rt:html /rnf:SirdasTests /ro:TestReports /rfp:ReportPageSize=100 /v:Verbose
exit /B %ERROR%
I hope this is usefull to you.