Making OpenBSD 3.1 ISO

I'm trying to make a bootable ISO, but there seems to be a probelm..I made a BATCH file to do some of the stuff.
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cd C:\OpenBSD
C:\WINDOWS\Desktop\tools\mkisofs -v -r -T -J -V "OpenBSD-Current" -b C:/OpenBSD/3.1/i386/cdrom31.fs -c boot.catalog -o C:/OpenBSD/OpenBSD-Current.iso -x C:/OpenBSD/OpenBSD-Current.iso C:/OpenBSD/.

"
And I get this message:::

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C:\WINDOWS\Desktop>cd C:\OpenBSD

C:\OpenBSD>C:\WINDOWS\Desktop\tools\mkisofs -v -r -T -J -V "OpenBSD-Current" -b
C:/OpenBSD/3.1/i386/cdrom31.fs -c boot.catalog -o C:/OpenBSD/OpenBSD-Current.iso
-x C:/OpenBSD/OpenBSD-Current.iso C:/OpenBSD/.
mkisofs 1.15a12 (i586-pc-cygwin)
Scanning C:/OpenBSD/.
Excluded by match: C:/OpenBSD/./boot.catalog
Excluded: C:/OpenBSD/./TRANS.TBL
Scanning C:/OpenBSD/./3.1
Scanning C:/OpenBSD/./3.1/i386
/WINDOWS/DESKTOP/TOOLS/MKISOFS: Uh oh, I cant find the boot image 'C:/OpenBSD/3.
1/i386/cdrom31.fs' !

C:\OpenBSD>
C:\OpenBSD>
"
As you notice, it is not finding to cdrom31.fs file. but I have it, I'v made directories and put it in them, and changed paths..Although ther eis an ISO image made to be bruned, I'm not sur eif it will boot, can anyone help? I would greatly appreciate it.

Why Linux forum?
Delete this and repost to Windows forum, not BSD forum though.