Question: I need to add a row to a spreadsheet using VBScript on a PC that does not have Microsoft Office installed.

I tried [`Set objExcel = CreateObject("Excel.Application")`]

Since Excel does not exist on the PC I cannot create this object.

Is there a way to modify a spreadsheet without Excel?

Answer: 
Not without extreme difficulty. Microsoft have released their file format specifications, [Excel here](http://download.microsoft.com/download/0/B/E/0BE8BDD7-E5E8-422A-ABFD-4342ED7AD886/Excel97-2007BinaryFileFormat(xls)Specification.pdf), but these are not to be taken lightly, and I think you will have a difficult time using VBScript.
You might want to see [this question](https://stackoverflow.com/questions/151005/create-excel-xls-and-xlsx-file-from-c#151048). It's C# based, but should give you an insight into the techniques for accessing spreatsheets.