Transform XML log action-pass xslt parameters

[teognost]

I need to transform a xml file-therefore I created a 'Transform XML log' action.
In the Transform tab i have put:
-Input file ->xml to be transformed (full path)
-XSLT stylesheet->xslt file (full path)
-Output file->the file resulting after the style was applied(full path)

But xslt file takes 2 parameters -testassembly and profiledassembly:
<xsl:param name="testassembly" />
<xsl:param name="profiledassembly"/>

How can I pass these 2 params into VBP action?
I do not see any place for setting xslt parameters.

Basically I need to implement into VBP this NANT task:
<style style="xsl\AddCoveredAssembly.xslt" in="${ncover.index}" out="${ncover.index}.tmp">
<parameters>
<parameter name="testassembly" value="${testassembly}"/>
<parameter name="profiledassembly" value="${profiledassembly}"/>
</parameters>
</style>