Okay, so, everyone is having problems using Optifine and Forge at once. Crashing, shutting down of internal servers, ect. I present a solution discovered by Soleie, I am merely sharing it with the server 'cause #mpm is da best and everyone needs it.
To begin with, download specifically download OptiFine 1.8.0 HD U A3 from THIS website. Don't hold me responsible if you accidentally download the wrong thing and get a virus, ;-;
Though once you do that, download Forge from THIS website, once again refrain from downloading any sorts of odd viruses that are obviously not from Forge's website.
As of More Player Models, you can download it here on THIS website, be careful not to downloaded viruses, be aware of what your downloading and if you do download the wrong thing; run a security check and remove it from your computer.
WARNING IT IS BETA SYSTEM AS OF MORE PLAYER MODELS, REFRAIN FROM THROWING YOUR COMPUTER DUE TO AUTOMATIC THIGH GAPS(and any other glitches).
Just make sure the width of the legs are around 96-100+ to avoid this <3
Once doing so, go to %appdata%, then go into your Minecraft folder. Remove any old plugins/mods from the folder that are not 1.8, move the files that you wish to use (Optifine/Forge/ect.) into the mods file. Next step is to double click Forge, push Install Client and then when you go to play Minecraft make sure you selected that account and wa-la enjoy Forge AND Optifine <3
Didn't know where else to post this so ye, off-topic section maybe? ;-;