Co-Dominant + Recessive

[aalomon]

Easiest way would be to breed one of the pastel het albinos back to the albino for 50% pastel albinos and 50% het albinos.

Sorry, no. That cross would give you

25% Normal
25% Pastel
25% Albino
25% Pastel Albino

Your odds are better, but its not a 50/50 split.