Well, I was going to but I emailed the VPS people before making this thread:
It said I get a free 24 hours of support so I'll use that.
I've tried loading runescape up in safe mode (unsigned > hold S while loading).
After the loading screen (I can see that fine) the bot client's screen just goes black. Any tips/help? I've had 2 other VPSes that I had to set up from scratch (E.G. installing bot/java) and both worked fine.