I was implemented in FTB Utilities v0.13 I believe... which is in Infinity Evolved modpack v2.3.3 but not earlier.
To chunkload, you first must claim some chunks so they turn green. Then you CTRL-click a green chunk to chunk load it.
I was excited to have this feature, however, I do not use it. I left my base chunks loaded overnight while logged off, and my mob grinder setup did not produce any materials (MFR Auto-Spawner and MFR Grinders). After some discussion with others, I conclude that mobs do not spawn with the FTB Utilities chunk loader. There are other possibilities to what went wrong, but I think that's the most logical reason. Other machines that were running did work while I was offline, so the chunk loading DOES work to some degree. However, the MFR Auto-Spawner is a big reason why I chunk load my base while I'm not there, to collect the drops from various mobs... so I immediately went back to using the Railcraft World Anchor and turned off the FTB Utilities chunk loading.
Another player on our server ran both chunk loaders at the same time and crashed our server. Do not run both chunk loaders, whatever you do!! It corrupted our world and we had to remove the World Anchor in MCEdit to restore it.
My opinion is that the FTB Utilities chunk loader is still not 100% stable, but I do hope they can resolve whatever issues it has.