Mook,
Sorry, I know that the tables from part 4 do take into account non-compact sections, but I didn't actually look at table 4-22 when I answered your question. This table is basically solving for conpression members in section E2.
Have no fear though. Table 4-1 will help you calculate the LRFD or ASD compression force in WF beams. Table 4-7 is for WT sections, and tables 4-8, 4-11, and 4-12 are for double angle and single angle sections. These tables do take into account if you have a non-compact or slender element in the cross section.
The only bad thing about it is that not all sections are in this table.