If you've downloaded and installed all the requirements (and the author has also listed all of them correctly), loading the preset without loading the sculpt should give you the same head as the images, and it should be easier to remove the makeup from there.

Once you get to Step 3, the head should look exactly as it is on the mod images and that's that. Presets (much like followers) are offered by authors as-is, it is not the uploader's responsibility to help you with further editing what is provided. I have never attempted to change the existing makeup of a downloaded preset, but I assume that if you load the sculpt with F9, the makeup loads with it (I could be wrong here). As far as I know, the makeup applied to a racemenu preset is 'locked-in' to the preset and the DDS file.Don't expect too much help since the preset will load perfectly on the author's set up and he / she can only help by double-checking the listed requirements. Either way, loading the facegen files will solve all issues, so if you can't get the same look even after following the instructions above, stick a picture (spoiler-tag it for courtesy) in the comments of that page and wait for the author / others to respond. I've always managed to correctly load downloaded presets without the facegen files by following the requirements but to be fair there are some authors who forget to list the overlay and slider mods they used correctly as well.

I've seen preset pages with no facegen files (the NIF and DDS) because some creators didn't know they should export them, and also some rude af one-liner comments demanding these files.

This entire process is easily repeatable so you can try it with other races. Check the mod's page to find out the race the author used for the preset.

Not all presets look good with all races.

Go to the Sculpt tab and load the sculpt with F9.

Skyrim how to load enb presents