alnx6xx.Z------support kernel version 2.4.x and 2.6.x(before 2.6.9).

alnx7xx.Z------support kernel version 2.4.x and 2.6.x(after 2.6.10).

alnx8xx.Z------support kernel 2.6.10--2.6.19 and after 2.6.20
               There are big change in kernel 2.6.20