is the goal to have better visibility of the cursor? I believe YoloMouse is ok to use and I'm pretty sure it works with EQ. Another option is to use AutoHotKey and highlight the mouse with a big fat circle, see the below video on how to set that up:
https://youtu.be/kwSqtNvT7to?si=XKd-uIu-LNgRBh07
I had confirmed a long while ago that AutoHotKey is alright to use on p99, just not for any automation purposes, and highlighting your mouse cursor to help those old eyes is not automation!