In your "Help" Folder rename current "UT2004Logo.bmp" to something else like
"UT2004Logo.bmp.original" & put new "UT2004Logo.bmp" in folder.

In your "Maps" folder rename current "NvidiaLogo.ut2" to something else like
"NvidiaLogo.ut2.original" & put new "NvidiaLogo.ut2" in folder.