1. If you have problems in opening any of the attachments, don\\\\\\\'t hesitate to message me - i will surely help you with such kind of issues!!!
In any case, the zip files can be open with 7zip, which is a free soft, available to download here: http://www.7-zip.org/download.html
The Microsoft Office files (doc, docx, ppt, pptx, etc.) can be opened with Microsoft Word, PowerPoint, Excel etc. Go to this link to download a 60 day trial version: http://office.microsoft.com/en-us/try/
For problems regarding different versions compatibility go here:
2. I have many other tutorials for different classes: ACC, FIN, BUS, BIS, MGT, RES, CJA, HCS, etc.....