I ve you got problems with lotro, that it crashes all the time after you are in the game and you are running a 32 bit version of windows here is the solution.
Normaly at high graphics lotro sucks up all your memory and when your virtual memory is to small the client crashes. (windows RAM is limmited to 4GB with the 32 bit version) normaly the default virtual memory is about 3GB.
So what i did is, I extended my virtual memory to 8 GB and the client doesn't crash anymore