Issues regarding steam ports installations should be resolved now. So please reinstall the steam games you would like, it should not give install errors anymore.
There seems to be an Winetrick/Steam install issue in Porting Kit since Thursday night. We are aware of the issue and working on a fix. We expect it top be fixed as soon as possible. The issue is in both production and Experimental version of Porting Kit. If you have earlier installed a steam port, then you might not have the issue (setup already cached).
Keep an eye on the blog for updates.