forgot the dependency to libusb-devel so the recepi goes like this:
1. uninstall ibmasm package: rpm -e --nodeps ibmasm
2. install libusb-devel
3. get ibmusbasm and ibm asu packages from ibm website
4. install packages
5. run: /opt/ibm/toolscenter/asu/asu show
6. change desired parameters with /opt/ibm/toolscenter/asu/asu set RSA...
janez