Back of a Stamp

Problem:
Dataset 1: ChIPseq-derived transcription factor binding sites. Mouse. Mapped to nearest Ensembl Gene ID,
Dataset 2: Human Illumina Ref6 expression array data (GPL6097, I think) from various cell lines with varying amounts of said transcription factor.
Question:
What are the targets of the transcription factor doing in the expression datasets?
Quick Mapping
As a quick approximation, map the Illumina human [...]