Usually, when you can see it rolling by some files and then it hangs during the boot (like in Safe Mode), it is not the last thing you see on the screen, but what comes after it.
What usually comes after KDCOM.DLL is BOOTVID.DLL which is the generic XP2 display driver, so we start thinking something to do with video. At least you have some video, so that is encouraging.
The file could need replacing, there could be a malfunctioning file system, something gone haywire during you repair attempt - too many variables!
Is there a power interruption, aborted restart or ungraceful shutdown in the picture here?
Create an XP Recovery Console CD and let's start with that.
When you have the afflicted system running RC, you should be in the C:\WINDOWS folder, so then run:
Here are some instructions:http://www.bleepingcomputer.com/forums/t/276527/how-to-create-a-bootable-xp-recovery-console-cd/
Somebody else can maybe help with how to copy your "stuff" off to a USB thumb drive or something using Knoppix.