Sorry about the late reply.. I didn't see your new posts..
You will normally be allocated to an enrollment day once you accept your offer. On that enrollment day, some general administration is done (stuff like HECS forms and a talk by the program co-ordinator about general course structure). After that you will go into a computer lab and people will instruct you on how to use MyStudentAdmin (enrollment into subjects) and MyStudentActivities (allocation of times). Both websites are first come, first serve; so the earlier you do it- the chances are you will get better times.
Also, I'd stick the the general course structure in the first year of university. It normally ensures you don't miss any prerequisites once you go into your subsequent years (as they are all core subjects which you have to do).
Business Core Subjects:
http://www.handbook.uts.edu.au/directory/stm90273.html
IT Core Subjects:
http://www.handbook.uts.edu.au/directory/stm90651.html
Read from course program:
http://www.handbook.uts.edu.au/it/ug/c10219.html
e.g.
Business Information Systems Management major/Marketing Major
Year 1
Autumn semester
31265 Communication for IT Professionals 6cp
31266 Introduction to Information Systems 6cp
22107 Accounting for Business 6cp
21129 Managing People and Organisations 6cp
Spring semester
31267 Programming Fundamentals 6cp
31268 Web Systems 6cp
25115 Economics for Business 6cp
24108 Marketing Foundations 6cp
Year 2
Autumn semester
31269 Business Requirements Modelling 6cp
31270 Networking Essentials 6cp
26134 Business Statistics 6cp
79203 Business Law and Ethics 6cp
Spring semester
31271 Database Fundamentals 6cp
25300 Fundamentals of Business Finance 6cp
Select one of the following: 6cp
21193 Business Strategy 6cp
22207 Accounting Transactions and Business Decisions 6cp
31247 Collaborative Business Processes 6cp
Year 3
Autumn semester
24202 Consumer Behaviour 6cp
24210 Advertising and Promotions Management 6cp
31257 Information System Development Methodologies 6cp
31255 Finance and IT 6cp
Spring semester
31272 Project Management and the Professional 6cp
24510 Advertising Research 6cp
24604 Project in Advertising 6cp
31245 Business Process and IT Strategy 6cp
Year 4
Autumn semester
24309 Introductory Marketing Research 6cp
24207 Strategic Business Media Planning 6cp
31258 Innovations for Global Relationship Management 6cp
31276 Networked Enterprise Architecture 6cp
Spring semester
59330 Advertising Practice 6cp
59333 Advertising Strategies 6cp
31280 Strategic IT Project 6cp
31282 Systems Testing and Quality Management 6cp
Let me know if you have any other questions. This can be a bit confusing...