Well.. I finally made it! No external programs used.. just good old school exploration. All done in a live server.
Here's how I finally managed it.
I had several major lagspikes which I tried to use to jump out of the instance quickly and try to make it (i had read that method in a post here), but it was too far away for the lagspike to continue. I would either get d/c or portal'd out of the instance. Impossible
So... I found an old wireless card I had, installed it, and attached a hotkey which disabled and enabled the wireless at my discretion. After many failed attempts, I finally got the right timing of enabling/disabling the net in order to just give the game enough to keep me online, but to keep the lag as long as I wanted.
I only managed to jump down to VC's boat before I got d/c not very impressive and not as much of a spectacular jump as I'd expected. Still can't get to all the cool stuff you could in 1.10. The ground behind the instance is not solid anymore, so a bit tricky to plan your fall from there. I'll try a few more angles next time, maybe can get to some ground. I'll try to make a video of it at some point too.
I put up a screenie for the sake of it.
Edit: Resize Image