Thanks for all your replies, they are all valid answers, problem is
none of them can be used in formulas.

Essentially what I need to do is put some numbers in front of an image
and use the numbers in a formula.

I'm trying to use a spreadsheet to document all our computer cabinet
layouts, using images of the server and putting power and heat outputs
over the top. I then want to be able to total up the cabinet and
provide a sub-total. All these sub-totals can then be added together to
provide total figures for the data centre.

Bezza