he probado con varios de los Quickcam vc y no me funciona...o sea no identifica que tenga algo conectado

Support Information:
Device Type: Digital Camera
Manufacturer: Logitech
Model: 8k89
Interface: USB
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=605&qa5=2&qa7=1500&dp=3&qm0=8k89&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Logitech+Digital+Camera++8k89+Windows+XP+Profess ional+) | Research manufacturer Logitech (http://members.driverguide.com/index.php?action=getinfo&companyid=605)

Logitech has no such model listed on their website so maybe you can pick your webcam from the photos:

http://www.logitech.com/index.cfm/405/&cl=us,en?prodcrid=405

and

http://www.logitech.com/index.cfm/405/&cl=us,en&legacy=1