Don't be afraid to ask if u have more questions :D If u are interested there's Tomb runner discord where u can get answers really fast or DM me or other runners https://discord.gg/jV6GNqz
First about setup, u gotta climb up very left on the second highest step, take step forward and then turn. It's important that when u start moving u only tap forward and after lara lands on lower stair u hold forward again and jump. The jump itself is quite tricky one. After that it's pretty much just grab timing. U have to grab really late, l'm not sure if it's last possible frame but it's really precise grab. And as Beckski said l wouldn't recommend it at all, saves very little time with a save.
I have steam version and lve tired ukbox and german/EPC. its same background in main menu and game is in english everytime after clean installs. We have allowed to get exe what u prefer and put it into installation folder. We have had epc and uk box now months with clear instructions how to use them. U know mixing game audio from english to german to japanese is wrong, everyone knows.
As l understand allowing game files is to make music work on EPC. Not being silly and put every version together as here has been done which is very unnecessry. Tr1 has a patch which was agreed to be used. Im using manual patch when we didnt know about automated one yet afaik. And l have not changed any setting since patching because thats how l was told.