P4 32 bits crash on Linux: I'll redo a test on my Core2 duo, the oldest CPU i have, but not sure at all i can reproduce the bug
Sad it would have shined since old cpu mining is my niche expertise, but maybe you use some old Linux distrib or something. It's a lot harder to support linux well because of the large variety of distribs. And i'm also more a Windows person.

Large pages, see the doc here, it needs to be manually enabled, but that's the exact same as for any other miner, so if you find a guide for xmrstak/xmrig/whatever, it will work the same.
https://github.com/jceminer/cn_cpu_miner#large-pages