Side scroll theme help

i have a client who wants to use this side-scroller template as a basis to build off of Side Scroller - Portfolio HTML5 Responsive Website Template . i’ve looked through the code and the webflow examples of horizontal scrolling and have a basic understanding of how its built. i informed the clients design team on how it works and uses the 100vw and frame to scroll. now that wireframes are coming in, i noticed that they have a few sections that expand much further than a single viewport. wondering what the easiest way to adapt the template to this is as it works off of calculating the VW with each section. do i split the longer sections into additional sections for calculations? and then how does this effect the vertical view? this will be my 4th or 5th site ive built on WF, but first time working with this style. thanks so much in advance!