Sorry I didn't mean to leave you hangin - lemme go look again I did mine myself by trial and error lol I'm no way an expert but I can find it again I'm sure brb
Ok here's where to go:
Manage my store > Custom pages
Then when you select layout just select text section, you can put a title for your page and then in the text section you can put the html for your storefront.
Then when you are done, go back to the custom pages page again and about half way down you will see "store homepage" and set that to the page you just made.
I hope that makes sense, if it doesn't let me know, I'll check back again to see if you got it.
Ohhh yeah buttons and stuff I made online with a free button maker and stuff - if you know html you should be able to do it fairly easy. I had no clue so I used a lot of online help and free button/banner maker sites and stuff