[galaxy-user] question about using bowtie

I am trying to use bowtie to assign reads to the s. Cerevisiae genome. I have data from paired end SOLiD sequencing with two unique six base pair barcodes. Can I use bowtie to make csfasta and qual files from my mixed original data split by bar code? I know I can use the trim option to remove the barcode, but how do I specify one only?