willtdb and ingsiang: When a mod is easymod compatable, it means that on a new phpbb install, easymod can install the mod. But, if you install any other mods before, then you may need to figure out descrepencies.
What you need to do is look in the files that is says it can't find the line in and locate what looks like it should be the correct lines. Then change the mod install instructions FIND statement to what you determine it should be. Then, try again with easymod. If easymod errors again on a different line, repeat the process. If it errors on the same FIND, then your change to the FIND has an error. If after the install, the mod doesn't seem to work, maybe you didn't FIND the right place. easymod backs up the files before modifying them.