Yeah. Didn't you read the documentation?
Get an elemental attack. Laz says that Stone Skin and Element-Enchanted statuses automatically give immunities in Hell. It's a flaw in the coding.
It's a modification. It changes all of the requisite parts inside of the patch_d2.mpq, and turns each part into something new. It's like playing a completely new game using the DII engine.
By the way, you can't play Ladder using Median. Open and TCP/IP only. Hamachi, I have found, seems to work for playing together.