Installing Debian Lenny

Two days ago I got my hands on Debian 4.0 testing DVDs. Debian installation was smooth on my previous PC but I ran into problems while installing it on the PC with ASUS P5K SE motherboard, IDE DVD-RW drive and IDE hard disk. Debian boots up from the install DVD but fails to find the DVD during the installation process. The solution is to boot with option 'expert generic.all_generic_ide=1'.