first step: install a font of your choice
in render.cpp init your new font:
void render::init() { menu = Font(XOR("Tahoma"), 12, FW_NORMAL, FONTFLAG_NONE);
menu_shade = Font(xor_c("Tahoma"), 12, FW_NORMAL, FONTFLAG_DROPSHADOW);
esp = Font(xor_c("Verdana"), 12, FW_BOLD, FONTFLAG_DROPSHADOW)...