Changes in CMS application

I already have an Content Mgmt Application the application needs to be chnaged a little in the following ways 1. It produces HTML pages. which r currently using IFRAME. I want them to use SSI instead so no IFRAME 2. There is a main categorypage where the updated articles in the category come. Right now the sequence is lastest is comiung last. I want latets to come first. This wont take more than 1 hour if somebody knows his skills well.