There is not an easy solution to this.
In the latest version, there is a provision of controlling and invoking the
system via an XML file.
However, you will have to maintain the XML file yourself with your own XML
editor. Look in the 1.2 release notes and additional documentation.

Signature
Dave Wickert [MSFT]
dwickert@online.microsoft.com
Program Manager
BI SystemsTeam
SQL BI Product Unit (Analysis Services)
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> We are using BI Accelerator and we faced the problem that it is not possible
> to insert new rows. We have some shared dimensions and when we define cubes
> we also have to add list of dimensions. Very quickly we fill in the whole
> space of the worksheet. The worksheet is protected and basically we do not
> have any ability to have the whole Warehouse definition on one workbook. How
> could we overcome this problem ?