Here is the tutorial how to make your PC installed 2 OS (Operating System). (You have to download Backtrack 5 OS in ISO file first)
Firts, you have to download Unetbootin Program here: CLICK ME!
After Download, follow these Step:
1. Run your UnetBootin,
2. Set the dropdown menus to Backtrack Distribution, and choose 5R1-KDE (depend on your Backtrack Os Type), then tick Disk Image ISO, Choose you Backtrack 5.iso, select the Hard Disk Type (choose pendrive id you want to make pendrive bootable for BT5), select the drive C:/ then click Okay:
3. Wait it untill finis the load up!
4. And now it is finish
So, what you have to do is, restart your computer, then chosse the Unetbootin when the boot menus are shown..