[BioC] Analysis starting from MAS 5.0 txt files

[Maurizio Stefani]

Hello,

I have a affymetrix dataset (23 arrays) consisting of txt files from 
the MAS 5.0 algorithm (original cel files are unavailable). I would 
like to analyze the data using R and bioconductor, is there any 
package for starting with these txt files? Also, I would like to do a 
RMA type normalization, is there anyway to do such a multichip 
normalization (quantile) on the txt file data?

Maurizio