Visual Basic Service Pack 5 fixes P&DW

I have find the following:

Visual Basic Service Pack 5 fixes:
Microsoft Agent 2.0
Visual Studio Installer
Installation information
Control issues
Package and Deployment Wizard issues
Miscellaneous issues

My question is if the SP5 fixes all bugs from Package and Deployment Wizard. Also what is Visual Studio Installer?
Thanks :)

VSI is similar to P&DW, but much, much better, IMHO. Available free from Microsoft.

Visual Studio Installer is easy such as P&DW?
What is IMHO?
Thanks :)