background probes for MTA in RASA

Question

[Juan Cordero]

I need to make an analysis of expression of Mouse Transcriptome Arrays (MTA) from Affy. I've seen in the template for the "conf" file it needs a ".bgp" file with the information about the background probes with the variable name of "BackgroundProbeFile". Do you know if it's possible to download such kind of file from anywhere od do I have to generate it from scratch?

Thanks