Hi:
This Tech Support note shows how you'd have to change the STYLE template used by SAS (if you decided to change the style template):
http://support.sas.com/kb/23/340.html
And this paper from NESUG shows how to use a customized template with a stored process:
http://support.sas.com/rnd/papers/regional08/SP_Template.pdf (even though the paper talks explicitly about tagset templates, the same general rules apply for defining the item store, writing the template to the item store, etc.
In your case, you would NOT be creating a tagset template, so your _ODSDEST reserved parameter would NOT change. However, your _ODSSTYLE parameter would change. If your company is using CSS files instead of SAS Style templates to style your stored processes, then a CSS solution, may work for you, as described here:
http://support.sas.com/kb/23/630.html
If you need more help with this task, I suggest you contact Tech Support.
cynthia