Here's my interpretation of that little solo thing in the Halo theme. You can move the whole thing up or down a couple of frets if you feel the need to get the sounds just right (I'm not sure on this), but the structure's correct, I think. This is how I play it.

e------------------------------------------5---------------5-----------7-----10~-101010-7-----10~--------
B-5--5-7h8--5h8-7p5---------7-5-5---5--7h8-------------5h7---8p7-5-7h8---8-5--------------8-5------------
G-------------------7-------------7-----------7p6-7-77---------------------------------------------------
D--------------------777777------------------------------------------------------------------------------
A--------------------------------------------------------------------------------------------------------
E--------------------------------------------------------------------------------------------------------

For continuity's sake, I do this little thing, not sure if it's right, or if it's even part of the thing, thought I might tab it anyway.

e-1010101010-12--12h14-15--12h15-14p12------------------------13-13h15-16--13h16-15p13-----------------------
B--------------------------------------15----------------------------------------------16--------------------
G-----------------------------------------141414141414141414------------------------------151515151515151515-
D------------------------------------------------------------------------------------------------------------
A------------------------------------------------------------------------------------------------------------
E------------------------------------------------------------------------------------------------------------

Play this fast.

e---------------------------------5-------------------------------------5------------
B-------5-55-7p5-8p7-5----5-7-8p7----8-7p5----5-55-7p5-8p7-5----5-7-8p7----8-7p5-----
G----------------------7-------------------7-----------------7-------------------7---
D-2~---------------------------------------------------------------------------------
A------------------------------------------------------------------------------------
E----0~------------------------------------------------------------------------------

Slow down a bit.

e-------------------5-6-8-6-5--8-6-8-6-8-6---5-6-5------------------
B-8-6-8-6-8-6-8-6-8------------------------8-------8-6--------------
G-------------------------------------------------------------------
D-------------------------------------------------------------------
A-------------------------------------------------------------------
E-------------------------------------------------------------------

There it is. After this, you can go back into the main Halo theme, or just finish with a G, improvise a bit, go to sleep, whatever. Feel free to correct it, as I'm sure that I might have made a few mistakes, seeing as though this is my first ever tab.

Enjoy.