It may be a scratched or dirty CD ???
Maybe try the No Delta version of 436 patch?
I believe that this version does not require the UT CD to be inserted.
Not sure but I think that is what I read somewhere.
You can get it here: http://www.hermskii.com/
Go to his Manual - it has links in the manual he wrote on installing UT.
Or I have links on MY site if you can't find it there.
http://www.hooksutplace.co.nr/
Good Luck!
It is looking in D:\ the file is not there. Check that your CD is still labelled D and not E or some other letter. The 436 patch on this site works for all of us. You run the patch, with Disk 1 in your CDROM drive. If it cannot find the file, your path is wrong. UT will remember which drive it was installed from and check that drive. Unless you moved some files around on your disc, everything should work smooth.