Release fixes with only some changes from CVS trunk without using branches

I have this kind of situation:

CVS trunk - all changes, stable ad unstable, are made to trunk.

production - major releases are made creating tags on CVS, but minor fixes are made manually, merging only the requested changes from trunk.

I'm not allowed to use branches, so I need an alternativ开发者_JAVA百科e solution to simplify or automate the process, because right now the risk of errors is too high.

Can anyone help me? Thanks!

You're right, that simple solution you're looking for - it's called branching.
Why are you not allowed to use branches? is it programmatically enforced? That's you're problem, and it is solvable - hopefully by canning the guy who forbids you.