Assuming you are using TortoiseSVN, following are the steps:
- Check out the 1.2GA source from here: https://nhibernate.svn.sourceforge.net/ ... nhibernate
- Right click on the working copy and choose "TortoiseSVN | Merge..."
- Point to the trunk as the "From URL": https://nhibernate.svn.sourceforge.net/ ... nhibernate
- To merge r2774, enter 2773 and 2774 as the "From revision" and "To revision".
- The above two steps tell TortoiseSVN that you are interested in merging the changes from r2773 to r2774 on the trunk.
- Click "Dry Run" if you are interested in what TortoiseSVN would do
- Click "Merge" to merge the changes.
- Repeat for r2836 (i.e. from r2835 to r2836), r2953, and r2955.