Yep, very easy :
put this in a text editor (Wordpad I think), and rename the file file the extention .html at the end.
then put this in the file :
<iframe src="https://checkvist.com/checklists/number-of-your-list" frameborder="0" scrolling="yes"
style="height: 100%;
width: 30%; float: left; " height="100%" width="30%"
align="left">
</iframe>
<iframe src="https://checkvist.com/p/XXXXX" frameborder="0" scrolling="yes"
style="overflow: hidden; height: 100%;
width: 70%; " height="100%" width="70%"
align="right">
</iframe>
Don’t forget to change the List URL / Permalink URL.
and here for 3 columns :
<iframe src="https://checkvist.com/checklists/you-list-number" frameborder="0" scrolling="no"
style="height: 100%;
width: 33%; float: left; " height="100%" width="33%"
align="left">
</iframe>
<iframe src="https://checkvist.com/checklists/you-list-number" frameborder="0" scrolling="yes"
style="overflow: hidden; height: 100%;
width: 33%; " height="100%" width="33%"
align="right">
</iframe>
<iframe src="https://checkvist.com/checklists/you-list-number" frameborder="0" scrolling="yes"
style="overflow: hidden; height: 100%;
width: 33%; " height="100%" width="33%"
align="right">
</iframe>