This is a mod by Cogswheel which lets you make a macro that calls other macros in a sequence. With all the changes to /castrandom and who knows what else this might be timely. I havn't got it to work but maybe someone else has been using it and can tell us their results:

Have you ever wanted to sequence arbitrary macro commands instead of just spells and items? Now's your chance! MacroSequence reproduces most of /castsequence's functionality but instead of individual spells or items, each element in the sequence can be an entire macro. There are only two missing behaviors of /castsequence: reset on target change (impossible to do with current state headers) and holding position if an action fails (something many people don't like about /castsequence anyway).

In addition to its sequencing, the macros can be of unlimited length. This makes MacroSequence a contender as an extended macro addon.

To create sequences, you need to edit a table in Sequences.lua, though I've tried to make this very simple. Here is the documentation comment at the beginning of that file:
http://www.wowinterface.com/download...oSequence.html