I've 2 remote HP Proliant DL180 G6 servers with HP Integrated Lights Out enabled on both and I have to install RHEL5 on these servers.

I try to do it with ILO - mounted ISO file from local hard drive as Virtual CD-ROM, and performed installation from ILO console. OS installation on the first server was successful. 
But I have to make 3 tries to achive this.

The channel between me and the servers is too slow - they are in datacenter. The installation takes a long time - 5-6 hours. So sometimes Virtual CD accidently unmounts and installation hangs.

How can I perform the installation on the other server in more convinient way?