There is a procedure to
link the file in to
Microsoft Office document as a
Display Icon which is available at
http://www.associatedcontent.com/article/321749/how_to_embed_existing_files_into_microsoft.html
Here I would like to explain how to do the same using OpenOffice.org suite
Step 1:
Click on the Insert section of tool bar and you will be able to an option with name Object. After clicking on Object you would be able to see OLE Object as further option and click on it.
Simply Insert --> Object--> OLE Object

Step 2:
Now a window opens something like below, then click on Further Objects and Click OK button.

Step 3: You are almost done after this step.
Now you have to select Create From File Option and then select the document to embed and click OK button.Same is show below. By now the file will be embedded in the sheet.

Finally the doc will look like below...

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Thanks