Trying to change version string in mIRC.

This is probably very simple for you guys, and may seem trivial or stupid. But it is just for experience like the last thing I did

The string it uses to reply as a version is "mIRC v6.17 Khaled Mardam-Bey", I couldn't see that in hex or when I viewed all referenced strings in olly. I could however find v6.17 in hex and when I searched for strings in memory in olly. Which makes me think that he is using something like.

"%s%s%s", programname, programversion, myname

At the place in memory where I found v6.17 I tried changing the 7 to an 8, then versioned myself. It replied with v6.18 so that must be the correct place. I was thinking he might be using programname/programversion in other parts of the program aswell so I was hoping I could find a solution without editing them. I had a thought that maybe I could edit the ""%s%s%s" (if I can find it) to a string literal instead, or perhaps point it to a different place in the file where there are some spare bytes and that I could write my own version string.

I think the problem I am faced with at the moment is that I don't know how to find %s%s%s, I searched for all referenced strings, and then searched those strings for %s%s%s there were quite a few of these. And I didn't really want to look at each one of them. Plus I think checking each one isn't really an effective method. So I was wondering, if I know the place in memory where v6.17 is stored, is there a way I can find where it is referenced in the program?

Thanks in advance guys.