Thanks UMENCHO,    this worked!

"But I have heard this in forum though I don't have a personal experience on it.

1. Download from Siemens site SP2. 
2. Unpack to folder without installation = Extract files to full package 
3. Open and edit SIA.INI = add ; to line in TERM section 
4. Install 

In this way you will install SP2 on 64 bits without need DVD.

Share your success if u r trying the same.