[Wine] Is there a way to force wine to use more memory?

[magmp]

Hello. I've noticed that some games(like Witcher) need more ram to use. Problem is that I've got 4gb (3,5) but after playing a while wine is crashing when memory riches 1,6 or 1,7 GB. Obviously  when you change some settings to low it runs longer, but some games just look great with full settings on(like Witcher:)  ) What I want to ask is that : Is there a way to force wine with some registry entry or with a patch to force wine to use 3GB or more of my RAM. Thanks for any answer on subject.