how to put data using shell script to a excel file

Hi,
Can any one tell me how to put data using shell script to a excel file from text file to other columns of excel file,leaving first column unaffected i.e it should not overwrite data in first column.
Say my text file data is:

15-dec-2008 15-dec-2009
16-dec-2008 16-dec-2009

say my first excel column is:

column1 column2 column3
server1
server2

I want output as below:

column1 | column2 | column3
server1 | 15-dec-2008 | 15-dec-2009
server2 | 16-dec-2008 | 16-dec-2009

Thanks in advance

command_prompt$ awk '{print $1}' excelFile > firstCol
command_prompt$ paste firstCol textFile
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