[Zope] HotFix? for commit_sub

http://zope.nipltd.com/public/lists/zope-archive.nsf/ByKey/F198A5DC70BC2D53 ...speaks about a new version to loose the problems with commit_sub when uploading large files. I can't just install a new version on our server, but a HotFix will do. Is there one? I know how to create my own HotFixes and I've looked at the difference in the code in Transaction but a bit afraid of doing the right thing. Some help please. Peter