i did some of RTFM and didn't find an answer to my question: is it 
possible to do %Subject% (i mean threads of wine-process)?
"attach wpid" puts me on the main thread:
Wine-dbg>walk proc
 pid      threads  parent   executable>00000016 3        00000014 'C:\windows\system\msiexec.exe'
Wine-dbg>walk th
process  tid      prio
00000016 (D) C:\windows\system\msiexec.exe
        0000001b    0 <=        00000018    0
        00000017    0
and i am able to do a "bt". how should i trace another threads?
btw, no docs says i must enter wpid in decimal form, while walk cmd gives
wpids in hexadec form. should i offer patch to some doc-file or have i
misread something?