MD2's not working.

Forgive me if this is easy, but I'm a bit of an SRB2 noobie. I have made a folder called "md2" includng everything I need. I've got Jeck Jim's 6.0 models and also a sonic boom pack. (seen here: https://mb.srb2.org/showthread.php?t=39370) I made a .dat file that says "PLAY PLAY.MD2 3.0 0 0 0' which is what a tutorial said to do. when i go into the openGL SRB2 and try to type "GR_md2 on" into commands, as directed. Nothing, it says unknown command. Am i behind, or what? if anybody can help that would be greatly appreciated. I want the boom models moreso than the Jeck ones so if someone could check those out that would be great. All replies would be appreciated :)

It's because that command doesn't exist anymore, instead just go to Open GL options inside Video settings and toggle on models.
"gr_models on" might work. Not sure.
Edit: those models you're linking aren't for the current version of the game. I assume you are playing 2.2.X because if it were 2.1 the game wouldn't reject "gr_md2 on".

Ahhhhhh, thanks. it's too bad these models are old. Ill try Jeck's again. Thanks for the help!