I second what Hoveton said- Info Sec professionals are in very short supply, but remember that for Info Sec you will need a hell of a lot of technical qualifications, at least an MCSA or MCSE from Microsoft, ideally a qualification from Cisco and in a perfect world your CISSP. If you then want to look at penetration testing you'll need a qualification in that as well. It adds up to a hell of a lot of money and time- but the end product is a VERY financially rewarding career path.
As for the ASIS CPP- best bet is check out the ASIS website,
ASIS International: Home Page but as a short guide you'll need security experience, they say at least 7 years with a degree( including 3 years in charge of a security team) to 9 years security experience without a degree (including 3 years in charge of a security team). Cost is as I recall about $450 for the exam- but you'll need the study guide and reference material, and you'll maybe need to attend a CPP cramming session, normally a 2 day event. For these costs best bet is to check on the ASIS website itself.