Most code editors have an option where you can configure tabs to behave as x spaces - you hit tab and it inserts 4 spaces, you hit delete, it removes 4 spaces (if it seems the 4 spaces should be treated as a group).
I work on projects where the coding standards specify to not use tabs - you must you 4 spaces per level of indent.
Maybe this feature exists (using TM2), and I just haven't found it. If not, I really hope you can add it - love TM2!
Thanks -Eric