Get a hex-editor (I recommend HxD, very easy to use and very user friendly) and open NHL'94 rom in it. Center ice logos are located at E03B7 - E0496 offsets, find it with "Goto" option. The center ice logos offset stars with 7B B4 9A 00 3C E5 9A 00 A1 BF etc etc and ends with 88 00 B6 D4 9A 00 C6 FF 88 00. You can also find beginning of the offset with "Find" option, search for 7B B4 9A 00 in Hex-values datatypes. The complete offsets values for center ice logos look like this in HxD: