I too would like to see these as an option to remove on estimates.  And NO you cannot upload your own template, only if you are using the Advanced version.  Not even in Plus can you use your own created template.   

I'd also like to be able to turn off the totals on the estimates since for us, each line is a possible purchase.  Our clients will choose one of the above not all of them so the total at the bottom is not needed.  But I should make my own thread for this.