> Here I can help some :).
>
> What I have done in the past is take advantage of the fact that org-mode
> will close a beamer =columns= environment if the column width is set to 0
> (or 1):
>
> ------------------------------------------------------------------------------------------
> ** What is a Type I X-ray
> Burst?
>
> *** ignore
> :BMCOL:B_ignoreheading:
>
> :PROPERTIES:
> :BEAMER_col:
> 0.33
> :BEAMER_env:
> ignoreheading
> :BEAMER_envargs:
> C[t]
>
> :END:
> - Low Mass X-ray
> Binaries
> *** ignore
> :BMCOL:B_ignoreheading:
>
> :PROPERTIES:
> :BEAMER_col:
> 0.3
> :BEAMER_env:
> ignoreheading
>
> :END:
> - Accretion of H and/or
> He
> *** ignore
> :BMCOL:B_ignoreheading:
>
> :PROPERTIES:
> :BEAMER_col:
> 0.4
> :BEAMER_env:
> ignoreheading
>
> :END:
> - Ignition at base of accreted
> layer
> *** close columns
> :BMCOL:B_ignoreheading:
>
> :PROPERTIES:
> :BEAMER_col:
> 0
> :BEAMER_env:
> ignoreheading
>
> :END:
> *** data
> :B_ignoreheading:BMCOL:
>
> :PROPERTIES:
> :BEAMER_env:
> ignoreheading
> :BEAMER_envargs:
> C[T]
> :BEAMER_col:
> 0.4
>
> :END:
> whatever else I want
> ------------------------------------------------------------------------------------------
>
> This creates a "row" on the top of the frame that has 3 columns of widths
> 0.33, 0.3, and 0.4. Then to close that "row" I made the =close columns=
> header with a column width of 0. The next header, =data= starts another
> "row" and its column width is set to 0.4 giving room for another column to
> its right if I so choose.