Knowing the font and its size, I see no reason you couldn't hack Poser to use a different font/size. I actually did it on a Macintosh with Poser4. This was for my own use because the font used on the dials was in italic and very very hard for me to read. And my Poser4 had not been supported for many years. This will require a trial & error approach:

Start with making a COPY of Poser.
Then open your COPY in a text editor.
Search for "Helvetica".

When you find the first instance, make a note of exactly where it is.
Change the name of the font/size to what you need.
Launch your COPY and see where the change took place.

If its not the correct change where you want it, Quit Poser.
Change it back to what it was in the exact place where you made the change.

Search for the next instance of "Helvetica".
Make the change.

And so on, until the scroll list's font changes.

Also consider that by doing this, you may void any warranty and get no tech support. But since its only a tiny cosmetic change for your own benefit, I can't imagine anyone getting excited and jumping up and down.

Good luck!  :)

 Don't sweat the petty things, and don't pet the sweaty things!  ; )