[jihadmeneer]

Code:

if(SkinSaving[playerid] = 1)
{
    SetPlayerSkin(playerid,PlayerInfo[playerid][eSkin]);
}

Has to be

Code:

if(SkinSaving[playerid] == 1) // or if(SkinSaving[playerid]) {
{
    SetPlayerSkin(playerid,PlayerInfo[playerid][eSkin]);
}

Nice tutorial.