A blank page ("White Screen of Death") almost always means that there is a fatal PHP syntax error on the page. Something went wrong with the code changes you made (whether manually or the add-on install) and PHP is falling over dead on that page. If you look around, you might see an error message logged somewhere, telling you where in the code the problem is (http://www.catskillt...index.html#wsod). In that case you could post that region of the file and maybe someone can spot the error.
What version of osC are you using? osC 2.3.4BS Edge is the only supported version. Is this add-on listed as compatible with your osC version?