Find christianlovs Skintone Changer at
The Sims2 Graveyard, the link will take you to the right folder.
Just be aware that there are several versions of said mod, christianlov_SkintoneSelector_severalversions.rar, christianlov_CustomSkintoneSelector13_20061124.zip and an add-on for InTeen users, christianlov_Jase_zzzChristianlov_SkintoneSelector.zip.
Afraid you might have to go for a try and error trip to find out which version will run with your game.
As an alternative, you could use SimPe and its SimSurgery feature to replace a skintone. I haven't got any tutorial links, though.