Firstly there is no career mode for internationl cricket. You can play a full season of English county or Australian domestic competetion.
Here are the tournments :
International :
1. World championship : its the World cup named differently either you can use the 2003 fixtures or randomise fixtures. I am guessing if you choose 2003, all the teams from world cup 2003 is selected to play otherwise CPU chooses the non international cricket teams.
2. World series : Played at Australia with Australia as default team and up to 5 teams can compete.
3. Knock out : Self explanatory.
4. Test Series : Custom series a test series against any nation and at any venue.
4. Foreign tours :
a. Ashes tour to Australia playing as England.
b. Ashes tour to England playing as Australia.
c. Long Australian tour (including warm games against the domestic sides)
d. Short Australian tour : Cant remember, will update it a little later.
e. Sub continent tour : Tour all 4 countries in sub continent.
f. Tour to Zimbabwe and New Zealand on a twin tour.
There are several more that fall under foreign tour category, will update soon.
Australian domestic :
1. Full season (Both ING and PURA)
2. PURA cup
3. ING cup
English domestic :
1. Full season
2. Frizzell County Championship (not sure if both divisions)
3. National League (not sure if both divisions)
4. Cheltenham and Gloucester