Try this:
Modified BIOSes for ASUS P3B-F, P3V4X, P3V133, CUBX, CUBX-E/L and P3C-E

I am looking for LinLin adapter for some time, where did you get yours?

Sadly it does not change the CPU name from Celeron to Tualeron.

I got it from a private seller in Germany. He only had two of them

Just to be clear, Tualeron never was an official Intel name for Tualatin core based Celeron processors. Intel referred to them as Celeron processors. The Tualeron name was coined by end users in order to more easily distinguish these CPUs from older Celeron ones when discussing said CPUs.

So what you are looking for is a custom personalization that is unlikely to have already been done (I could be wrong).

Sorry if you already know this .

I know. I just want it for aesthetics 😁

I've seen a screenshot from one guy here who had customized his bios but I can't find it again

After fiddling around with BP Patcher and flashing supposedly corrupt bios files, I just extracted the stn.bin from the bios and hex-edited the Celeron string to Tualeron 😁