Today I installed RedHat 9 only to find that no bootloader was installed. I selected LILO to install on the first boot partition (as I am multitasking with XP) but when i click Exit to reboot my PC. It brings up a screen with loads of stripes

I reset it and it goes straight to XP! When i update my RedHat installation it says That No Bootloader was installed!
Can I install one manually?
Why the screen with stripes?
Is it because I have a Integrated graphics card and a PCI graphics card and it detects my Integrated Card which is disabled at BIOS?
Please Help!
Josh