Exploring possibilities- word document/Excel as central repository

Hello,

My customer is having a great requirment, as per requirment i want the word template/excel/powerpoint that i am using as a user interface is changing everytime,

so could any one tell me that is it possible to store and display the word/excel/powerpoint as central repository and can change anytime if customer requires to change it.

FYI only this part

at user interface i am just opening the word document and displaying to the customer once the word/excel/powerpoint is saved the document is inserted into richtext field.

and when user opens the document it lets user to open directly on word template.

any idea?

Regards

Dev