Brod has released his F-Zero X Climax mod in this thread at EmuTalk. Head over there and give him some feedback. Here are some notes on the release:
So all you need is the " F-ZERO X (U) [!].z64 " or the "F-ZERO X (J) [!].z64 rom", an emulator ( pj 64 1.6 is fine ) or a backupdevice and a n64.
a) Double click on "Lunar IPS.exe"
b) Click "Apply IPS Patch" and select the patch file "F-Zero X Climax (U.S.) [!]. ips" or F-Zero X Climax (J) [!]. fps.
c) Then select the rom "Climax F-Zero X (U) [!]. z64" or F-Zero X Climax (J) [!]. z64
Note: You must set the file type to "Most common ROM Files" to "all files"
d) You have the patched rom;-)