Does anyone know how I can normally open a spreadsheet and execute
workbook_open code and other times open without executing workbook_open code?

I have tried holding the shift key when opening but the workbook_open code
still executes.

I am using Excel 2007 12.0.6504.5001 SP2 MSO 12.0.6425.1000

Some Background:
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I use spreadsheets as a powerful and flexible means of reporting data
contained in an SQL database. I save the spreadsheets as an XLT.

When the spreadsheet is opened, I use workbook_open code to pre-load data
from SQL that is used as combo-box list sources - and set other initial
values. The user selects from the combo-box then further data is retrieved
that relates to the combo-box selection.

When I want to change any macro logic I don't want the pre-loads etc to
happen. So I right-click and open the spreadsheet as an XLT. I have
incorporated code in the workbook_open routine so that if the spreadsheet is
opened as an XLT then the routine is exited and the pre-load data does not
load and initial values are not set. All works well.

My Problem is when the spreadsheet is opened from a hyperlink :
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1) In this case the spreadsheet opens as an XLT and the pre-loading and
initial setting don't happen.

2) If I save the spreadsheet as an XLS then the pre-loads etc happen, BUT
when I need to change macro code, then I know of no way to prevent the
pre-loads.