By manually removing the top two lines (they are comments), then adding 0.0.0.0 at the beginning of each line, like so:
Code:
0.0.0.0 1-cl0ud.com #Lead Forensics
0.0.0.0 1-creative-1.com #Lead Forensics
0.0.0.0 103bees.com #Tracker Unknown
0.0.0.0 105app.com #Tracker Unknown
0.0.0.0 10cms.com #Amplience
0.0.0.0 123-tracker.com #Lead Forensics
0.0.0.0 123count.com #SpidersWatchp
0.0.0.0 161media.com #161 Media
0.0.0.0 1800omniture.com #Adobe
0.0.0.0 1s3h4f7sl.com #HelloWorld
0.0.0.0 200summit.com #Lead Forensics
0.0.0.0 206ads.com #Advertising Unknown
Then host the file somewhere accessible, select Custom as your hosts file type and put the link into your custom_hosts_list.txt.
Then run (u) to run it.
I would not recommend it though, who updates this file for you regularly?