Cannot run the quartus 9 on CentOS 5.4

something strange there, it looks like its installed already. i just grabbed 9.1-linux-free and here's my ls:

$ ls
adm.gz        dev_info.txt    ip_lic.txt    md5sum.txt   stub.csh
agx_we.gz     devinfo_we.gz   libraries.gz  perlsrc.gz   stx2_we.gz
aii_we.gz     dsp_builder.gz  license.txt   qcleanup     stx3_we.gz
common.gz     eda.gz          linux.gz      qdesigns.gz  stx4_we.gz
compare       gpl_lic.txt     lmf.gz        qt           stx_we.gz
cusp.gz       gtar            m3k_we.gz     readme.txt   sys_reqs.txt
cyc3_we.gz    gzip            m7ka_we.gz    sgxii_we.gz  tutorial.gz
cyc4gx_we.gz  help.gz         m7k_we.gz     sgx_we.gz    version.txt
cycii_we.gz   install         manifest.txt  sopc.gz
cyc_we.gz     ip.gz           maxii_we.gz   space.txt