Thanks for your answers and sorry for the inconvenience. I've bought the game in Ukraine as I was in a vacation 2011. Installed it on my notebook. And it hasn't asked me for a steam account for some reason. Or I just not remember :O_o: Anyway, it works without steam. After some time I come back to this game and wanted to play modified version of it. Now I've registered the game with steam and the solution with -forcesteamloader really works. The SKSE takes my skse.ini configuration and 768 MB for allocated memory seems to work fine (skse logs are correct). But now it saves any MemoryBlocksLog.log files anymore. So I can't check the real allocated memory usage.
