Flaminsmart

Ok i have lots of pics and i want to combine the faces off these pics into one big collage type picture is this possible to do on paint shop pro?
The pics are of my little boy and i want to just have faces on this picture to show how he has changed in the last 20 months.
eventually being done in pencil on paint shop pro to print it off
Please can someone tell me how to do it??? or if indeed it cant be done
any tips would be grateful
Tams

oh and by the way i only have the trial version and am a complete beginner so idiots guide would be even better