Create my own HTML email signature help with fix

I have an email signature that I get from WiseStamp.com. It uses HTML. I want to create this myself for my mac mail. I have successfully transported it to my own server as far as holding the images the html uses. However here are the 2 things that I can't figure out. 1. My twitter feed. Wisestamp grabs my latest twitter feed each time and adds it to the email along with time and date stamp. I want this. Probably can just add it based on my rss feed from my twitter feed. Just add the newest one each time the html is called back up. 2. A quote added from [login to view URL] needs to be updated at well upon each new email. Based on this feed...[login to view URL] Just add the newest one each time the html is called back up.