I edit mine. There might be on the skin you are using a place for height on the window you are using. Turn on advanced when choosing a skin. The skin I'm using most recent I'm using the calendar widened a tad and the events widened to match it and made 500 long. I put them one under the other.
If the file is a modern one, it uses the same trick as Wincustomize files - it is a zip file in disguise. This way you can tinker with it yourself.

I use about 20 ics files, both active and static. I'm using the 64-bit version of Pro and this skin is called Chromophore. Not all skins use the cute little pictures as shown here, and fixing a skin so it uses them is possible but I'm not very great at it.