Hi hoh818,
As noted in the FSW forum, you CAN get a study permit for part-time studies. However, I'm afraid that won't work for the CEC class -
http://www.cic.gc.ca/EnGLish/immigrate/cec/graduates.asp
To qualify using education+1 year of work experience, the education has to meet certain requirements including 2 years of full-time study. (Moreover, the post-grad work permit can only be obtained if you were a full-time student).
To qualify using work experience alone, it must be 2 years of work experience. So, if you did one year of work on a 1-year post-graduation work permit, you would have to find a way to do another year of work.
HOWEVER,
Your plan MIGHT allow you to qualify under the Federal Skilled Workers program, Category 3: For students or workers who are legally residing in Canada, and have done so for at least 12 months immediately before submitting their application.
http://www.cic.gc.ca/english/immigrate/skilled/apply-who.asp
Unlike the CEC program, however, you would have to be able to meet the "proof of funds" requirement.