Is it possible to make my progs write debug information in the output text file? Console printing is uneffective method in case of some bad error occurrence.

Use the -debug parameter when running the game or mark the "create debug file" option in the launcher, with this set, Vavoom will create a debug.txt in your basev folder which will contain the debug of everything that is logged to the console.

It will?? <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":?" title="Confused" /><!-- s:? --> Strange, maybe I just didn't noticed.