LG P500 Rooting Isuue
Just few minutes before I again rooted my LgP500 running v2.3.3 stock v20d. I used SuperOneClick v2.3.3 and rooting was just a cake walk. I charged my phone fully and installed Lg's drivers and enabled USB debugging support. In the SuperOneClick's UI, I just clicked Root and waited for few tense minutes. Phone restarted automatically and after that the UI said rooting was successful.

It is not clear what you ask about booting, I just switched on normally and phone works normally. 

Update: Found a link as asked...