The save files are here:-
http://webplus.forum.chit-chat.co.uk/temp/nethack.ZIP
I cant see 1lock file though. Arnold is the one.
It froze when I just got level 5 Exp, moved around to get my pet near me and then attempted to go down to level 4 IIRC. I waited for 2mins or so, then I booted the 2x...