No need to worry, I've just installed this to my own server and wow this is fast.
I upgraded the memory allowance and timeout greatly and believe me this is a pretty, cool fast bit of software. I look forward to seeing the results in the next few hours.
May I recommend a future feature? To select the crawl depth by levels, eg. level 2, level 3 etc. I know you can do this already in kind, but that would make things simpler.