Thanks for all people who have answer to my question THe solution i used ( recommended by Jean-Yves Lenhof) is this one Install the package anaconda-runtime Edit the line concerning the the network modules in the the file mk-images.i386 in the /usr/lib/anaconda-runtime repertory Here is a patch for exemple I repalce the hp100 network driverk by the 8139too driver diff -ru anaconda-runtime/mk-images.i386 anaconda-runtime.transtec/mk-images.i386 --- anaconda-runtime/mk-images.i386 Mon Apr 9 08:05:01 2001 +++ anaconda-runtime.transtec/mk-images.i386 Wed May 23 08:06:56 2001 @@ -55,7 +55,7 @@ LOCALMODULES="$COMMONMODULES BusLogic aic7xxx megaraid ncr53c8xx sym53c8xx $IDEMODS $SCSIMODS" NETWORKMODULES="$COMMONMODULES nfs 3c59x ne2k-pci de4x5 - eepro100 e100 tulip pcnet32 hp100 + eepro100 e100 tulip pcnet32 8139too sis900 " PCMCIAMAINMODULES="$COMMONMODULES nfs $IDEMODS $SCSIMODS" And launch the script buildinstall The script does a lot of more than just create custom bootnet disk but at least it work well for what i need to do Thanks -- Eric Doutreleau I.N.T | Tel : +33 (0) 160764687 9 rue Charles Fourier | Fax : +33 (0) 160764321 91011 Evry France | email : Eric.Doutreleau@xxxxxxxxxxx