I see you are using SLES (there is a separate forum for that BTW), so you can’t compare SLES 10 with SUSE 10 and udev doesn’t apply here. SLES 10 is probably more like SUSE 9, which is where this convention of naming the script after the MAC address comes from. It will probably break if you rename it because the startup script tries to activate the NICs by looking for a script named by MAC address. Why do you want to rename it anyway? Just leave it alone. If you want to create a config for eth1, follow the same pattern, name it after the MAC of that NIC.
BTW, there is also a ncurses verion of YaST there too.