The config file I sent you was config-2.6.31.5-desktop586-1mnb. In case it helps, the Mandriva kernel-source-2.6.31.5-1mnb-1-1mnb2.i586.rpm package is at ftp://mirror.cc.columbia.edu, in the pub/linux/mandriva/official/2010.0/ i586/media/main/release directory.