I'd like to share my experience in installing an April 2015 Insider Preview Windows 10 in an Acer Aspire One, model KAV10.
First of all, I upgraded the RAM memory to 2 GB. I downloaded the 32 bit version of Windows 10 and the Windows USB/DVD Download Tool, as oriented by jmshub. I burnt a 4GB pendrive and replaced the original HD with a spare one so I could make a fresh install.
The first try wasn't so straight as I expected. The installation process hanged up in the final steps so I had to start it over.
In the second time, though, everything went well and the installation process has been completed after two programmed reboots in about 1:30 hs.
Windows 10 recognized and installed camera and touchpad drivers and both of them are running perfectly.
The boot time is incredibly shorter than XP's and the performance
is very good too. I experienced no problem with screen size or resolution, my main concern before the installation. Until now the update has been worth !