» Mon Jun 04, 2012 4:02 pm
The 4 "extra side missions" are called "Special Jobs". They expand the influence of the TG into Markarth, Solitude, Whiterun, and Windhelm. You have to complete 5 jobs in each of those cities and then Delvin will offer you the "Special Job" (quest) for that city.
The 5 jobs can be for either Vex or Delvin or any combination thereof (ie 2 for her & 3 for him, 4 for her & 1 for him, etc), but you must do 5 in each city. You can drop those jobs if you don't like the mark or location and pick up a new one - no penalty other than a failed quest in your log.
After you do the Special Jobs Change in Management will start - the quest that makes you Guildmaster.