HELP!!! Dual boot install failed, can't get into computer

Hi:

Please help me if you can.

I had win98se on my computer. I tried to install winxp on an
empty hard drive, but the install failed. When I turned the computer
on, i would get a dual-boot screen screen letting me choose winxp or
win98.
If I chose winxp, a message comes up saying the system was halted
due to an error.

So I tried going into win98se. I was able to do it.
I noticed that a bunch of new files were on my C drive, including
boot.ini, ntldr, and some others.

I decided I wanted to get rid of this whole failed XP dual boot
setup, so I went through and renamed all the new files, putting an
"xxx" in front of their names. For instance, boot.ini now became
xxxboot.ini.

I did this to all the new files. I thought that would get rid
of the dual-boot screen that didn't work.

Well, I really screwed things up.

Now the computer won't boot at all. I even put in a win98se
boot floppy that has always worked in the past.

I am able to get the black dos-like screen that shaows c:\, but
I can't get any further.

Can someone please help me. I know I screwed up big-time, but
is there a way out of this.

If I can get back to win98se, I'll never touch that damned xp
again!!

Thank you.

dave