Might a prospective employer hold my "packet change" jobs against me???

You are actually already doing the right thing. You do not have to disclose those "unrelated" job experiences on your resume, but you should definitely include them on an application form. If and when you are asked to explain the discrepancy, explain that those other "unrelated" jobs were to help you pay off your debts and other luxuries and that they have never interfered with your primary source of employment. Most employers understand. If they don't understand, it is clearly not going to be a cohesive work environment for you. I have a few clients that are currently in the process of changing careers and they too have second jobs, but it has not hindered their chances for being hired.