Welcome to the parts authors community!
The chef torso is available officially as 973p2a, see here
http://www.peeron.com/inv/parts/973p2a
The ice cream brick is available as unofficial (in development) part here
http://www.ldraw.org/cgi-bin/ptdetail.cg...004p07.dat
The vest torso
http://en.bricker.ru/parts/973pb69c01/
and the "SNACK BAR" brick part
http://www.peeron.com/inv/parts/3008px13
seem indeed to be missing as far as I can see.
Good starting points to seek for tutorials for parts authoring are IMHO
http://www.ldraw.org/article/58.html#parts_authoring
http://www.philohome.com/ldraw.htm
have fun!
The chef torso is available officially as 973p2a, see here
http://www.peeron.com/inv/parts/973p2a
The ice cream brick is available as unofficial (in development) part here
http://www.ldraw.org/cgi-bin/ptdetail.cg...004p07.dat
The vest torso
http://en.bricker.ru/parts/973pb69c01/
and the "SNACK BAR" brick part
http://www.peeron.com/inv/parts/3008px13
seem indeed to be missing as far as I can see.
Good starting points to seek for tutorials for parts authoring are IMHO
http://www.ldraw.org/article/58.html#parts_authoring
http://www.philohome.com/ldraw.htm
have fun!