Can I remove first boot on a dual-boot system?

I setup a W98/XP dual-boot system on my desktop many years ago. It's a dedicated PC for running MAME in an arcade cabinet.
I'm looking to cleanup it up a bit, but not re-install XP (it's running fine).
I currently have W98 installed on the C: Drive and XP installed on the D: Drive, with it booting directly into XP. Can I easily remove the C: drive and W98, without disturbing XP? And re-allocate the un-used space?

Please instruct me how.

Thanks

Boot into the new Windows XP and set your Folder Options like this:

https://discussions.virtualdr.com/im.../2012/03/3.gif

Then, in Explorer you can delete everything from the C:\ drive except:

Boot.ini

ntldr

ntdetect.com

Then go to Start>Run>msconfig, then in the Boot.ini tab, click "Check all boot paths". That should get rid of the dual boot menu.