[BioC] Affy: chromosomal localization with expression value for of gene lists

[Dr_Gyorffy_Balazs]

Hi All!

I have a list of genes (Affy ID), and an expression value
for each gene.
1. how can I draw a map of chromosomes, on which the genes
are marked?
2. is it possible to color-code the genes on this map?

Is there any package, which is capable to do this?

Thank You
Balazs