Sorry to kick an old bucket, but I'll be here to give a concluding comment.
ModLoader(1).zip - OK
[1.5.1]ReiMinimap_v3.3_04.zip - 1 errors
OptiFine_1.5.0__HD_U_A3.zip - 7 errors
If you have any future issues, ModLoader comes first, any APIs, Optifine, and then other mods. Unless a mod states it has to come in a specific order.
Here's what you do.
You nagivate your world by memory like us REAL MEN.
In all seriousness though, I think modloader has some issue with optifine.
I have used ModLoader and Optifine, since the dawn of man, and have not had any issues! I think it's just how you installed them.
And always check the version of your mods. It looks like you got Optifine for 1.5.0 and not 1.5.1.