sim085 wrote:
How do I install these icons, because the package does not seem to have an installer. I read the read me and it says to use some InstallIcon program. However should I put these icons in some location on Workbench (example C:). I never installed icons before and do not know how best to do this.
IIRC, that package is not large enough for WB 3.1, i.e. it doesn't provide all icons for your OS, perhaps only for WB 2.x level, not all additional which are present with WB 3.1. Moreover, as you already had discovered, replacing icons can take a while (up to few hours, depending how much stress you can handle by stupid repetitive action) since simple overwriting will also reset tooltypes and other icon attributes.
I went that same road before only to conclude it would still be short of full effect, so your best bet would be the one Matt_H proposed - save for Indivision ECS and then enjoy full PAL HiRes Laced (640x512), without hassle of that limited tweaks.
Anyway, that's the way I'm trying to solve same or similar problem(s).