By part where they try and send you to Xen, I'm talking about the big laser array room where they attempt to teleport you there before you actually get to Xen.
I think it's safe to say plenty people here have mentioned issues of one kind or another with this mod, but I am wondering if it might be that some of the uploads are corrupt. Like I said earlier, I got a corrupt archive warning when unzipping it with WinRar before installing, and others have mentioned various errors too. Normally when I get a corrupt archive error on a file it won't even extract and install, but since it did I pondered whether WinRar was just misdiagnosing the file, and went ahead and played it anyway.
I have however noticed certain textures now and then flash bright green. Whether that's the mod, the file being corrupt or the 306.23 drivers I just installed, I don't know. I'm running an older GPU (GTS 250 1GB), and once in a while older ones don't jive so well with Nvidia's latest drivers even when they claim they're supported by them.
As far as whether it's my system having problems, as I also stated earlier, when first having severe lag problems with this mod, I exited the game and launch Sleeping Dogs, and it played just fine on a pretty lengthy session. I DID notice however that defragging cleaned up performance again. It's kinda odd that a game running on an engine as old as Source would be so in need of defragging constantly where other more modern and higher resource games are not. I can only assume that means this mod is terrible at writing saves to the page file and/or a result of a corrupt file.
At this point I'm content to wait until they're finished with it and next time DL maybe straight from Steam in hopes to get a more stable file. Although it could indeed be a corrupted file, uploading them properly to the sites they link you to is also part of the responsibility of the mod team, and I don't ever recall getting a corrupt DL from Gamershell before.