The sale_layout module enables you to have a more elaborate template than the standard order forms.
For example you could put the following in the order lines:
a horizontal separator line,
titles and subtitles,
subtotals at the end of the section,
a page break.
This enables you to lay out a more elaborate professional-looking quotation page. There's also the module account_invoice_layout which gives you the same functionality for invoice templates.
The two figures Template for an invoice in OpenERP using the account_invoice_layout module and The resulting printed invoice show an invoice template in OpenERP and the resulting printed invoice.